小亮购买每支0.5元和每支1.2元的笔共20支,付20元找回4.04元,两种笔各买多少支?列方程解_作业帮
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小亮购买每支0.5元和每支1.2元的笔共20支,付20元找回4.04元,两种笔各买多少支?列方程解
小亮购买每支0.5元和每支1.2元的笔共20支,付20元找回4.04元,两种笔各买多少支?列方程解
设买了0.5元的笔X支,1.2元的Y支X+Y=200.5X+1.2Y=20-4.04解得：X=
Y=题目中4.04是不是打错了,应该是4.4,如果是,则X=8,Y=12Galaxy S5 (G9006v，G9008W，G9008V，G9009d，G900f，G900h，G900p，G900s等)
Galaxy S4 (I9500，I9502，I9505，I9508，I959，I9507，I9507v，I9508v)
4.2.2，4.4.2
Galaxy S3 (I9300，I9300I，I9300T，I9308)
Galaxy Note 4 (N9100，N9180，N9106W，N9108V，N9109W，N910C等)
4.4.2-5.0.1
Galaxy Note 3 (N7502，N7506V，N7508V，N9002，N9005，N9006，N9008等)
4.2.2,4.3.0,4.4.2
Galaxy Note 2 (N7100，N7100T,N7102，N7105，N7105T，N7108，N7108D)
4.0.3-4.4.2
Galaxy Note 10.1 (N8000)
4.0.4-4.2.1
Galaxy SII (I9100)
2.3.3-4.0.4
Galaxy Note（国行：I9220，港版：N7000）
2.3.5, 2.3.6（内部版本号ZSKK1），4.0.3-4.2.1
Google Nexus S
GT-S5820（移动定制机）
2.3.4-2.3.6（内部版本号ZMKH6, ZMKK1, ZMKK2, ZMKK3）
Galaxy Ace (S5830, S5830i, S5838)
2.2.1-2.3.6
Galaxy S (I9000, I9088), Galaxy S+ (I9001)
2.1-update1 - 2.3.6
Galaxy SL (I9003)
2.3.5, ZNKI2版
GT-I9108 (移动定制机)
Galaxy Gio (S5660)
2.2.1-2.3.4
Galaxy Fit (S5670)
2.2.1-2.3.4
Galaxy W (I8150)
2.3.5（内部版本号DXKJ4,DXKJ5,ZCKJ5,ZCKJ6,ZSKJ1）
GT-I9008L (移动定制机)
Galaxy Mini (S5570, S5578)
2.2.1-2.3.4
2.2.1, 2.3.5
SCH-I339/I509/I519/I535/I545/I579/I605/I619/I629/I659/I679/I699/I699I/等
4.0.0-4.4.2
SCH-i809, SCH-i909
2.2.1-2.2.2
2.2.1-2.2.2
SHW-M100S/M110S/M190S
SHW-M250L, SHW-M250S
2.3.4-2.3.5
SHV-E120S, SHV-E120L
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Galaxy Player (YP-G70)
2.3.6-4.3.0
GT-I/I/I/I/I/I9001等
4.1.2-4.4.2
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2.3.3-2.3.4, 58版以及之前的版本
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2.3.3-2.3.4, 58版以及之前的版本
2.1-update1 - 2.3.3
E10i, E15i, E16i
2.1-update1
2.2.1, 2.2.2 (内部版本号2.11.0 - 2.13.0)
2.1-update1 - 2.2.2
ME525+, MB525+
2.3.4, 2.3.6（内部版本号4.5.1-134_DFP-132/137）
2.2.1-2.3.4（内部版本号4.5.3-109_MS2-3）
2.3.6, 71版
MB860, ME860
XT316, XT319
2.3.4, 2.3.5, 4_48D_7009之前的版本
XT800, XT800+
2.3.5-2.3.6
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4.2.1,4.4.4
HM Note 1LTE
HM Note 1w
HM Note 1TD
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2.3.3-4.0.4
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HTC Hero (G3)
HTC,HTC Legend (G6)
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HTC,HTC Wildfire (G8)
2.2, 2.2.1
HTC,HTC A9191 (G10, Desire HD)
HTC,HTC Incredible S (G11)
2.2.1-2.3.4
HTC,HTC Desire S (G12)
2.3.3, 2.3.4
HTC,HTC A510e（G13, Wildfire 野火S）
2.3.3, 2.3.4
HTC,HTC A510c（G13, Wildfire 野火S电信版）
HTC,HTC Sensation (G14, Z710e)
HTC,HTC Salsa (G15, C510e)
HTC,HTC A810e (G16 ChaCha)
2.3.3-2.3.4
HTC,HTC EVO 3D (G17, 电信版 X515d)
2.3.4-2.3.6
HTC,HTC Sensation XE (G18, Z715e)
HTC,HTC Rhyme (G20, S510b)
HTC,HTC T328t（新渴望VT, 移动定制机）
HTC,HTC A6390（天姿, 移动定制机）
HTC,HTC A9188（天玺, 移动定制机）
HTC,HTC S610d（纵横）
HTC,HTC Z510d（双擎S, 电信定制机）
2.3.4（内部版本号195260）
HTC Rezound (Vigor)
2.2.2, 2.3.5（内部版本号V21a）
P350, P355
2.3.4（内部版本号V10c）
荣耀3C（H30-C00，H30-L01，H30-L02）
荣耀3C畅玩版（Hol-T00）
荣耀6（H60-L01，H60-L02，H60-L21）
荣耀畅玩版（G750-T01）
4.2.2，4.4.2
荣耀3X（G750-T00，G750-U00）
4.2.2，4.4.2
HUAWEI P6-t00，P6-C00
4.2.2，4.4.2
P7-L00，P7-L07，P7-L09
G610-U00，G610-T00
G700-U00，G700-T00
G730-U00，G730-T00
MT1-T00,MT1-U06
C8816，C8816D，C8817L
T8620, T8830, T8830 Pro (仅适用B108版）, T8950
4.0.3-4.0.4
U8500, C8500, C8500S, C8600
2.1-update1 - 2.2.2
C8550, S8520
C8650, C8650+
2.3.3-2.3.5
T8100, T8300, T8600
HUAWEI C8813，C8815
4.1.1，4.1.2
HUAWEI U8825D
HUAWEI C8813Q，C8813DQ
HUAWEI G510-0010
HUAWEI T8951
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HUAWEI C8813D
HUAWEI C8812E
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HUAWEI U8661
HUAWEI U8825D
HUAWEI Y210-2010
4.1.2,4.2.1
U930, U950, U970
4.0.3-4.0.4
U802, U806
U880, V880 (Blade)
2.2-2.3.7（之前的版本）
2.3.6-4.0.4
N600+, N700
2.2 电信版
N606, U830, N880S
A820/A820t/A820e
S850e, S880, S899t
A580, A698t
4.0.3（内部版本号S138以前的版本）
2.3.5（内部版本号S120~S124）
2.3.3-2.3.5
2.3.7（内部版本号S139, S141）
乐Phone S2
乐Phone S760
乐Phone A1
2.3.4 07版
3GW100, 3GW101
Lenovo A820t
Lenovo A60+
Lenovo A690
Lenovo A820
Lenovo A798t
Lenovo A630t
Lenovo A60
Lenovo A66
Lenovo S720
4.2.2,4.4.2
4.1.2,4.2.2
D530, D539
2.1 - 2.2.1
W706, W706+, W708, W713
N930, N950
2.2.1-2.2.2
2.2.2, 2.3.7
Coolpad 7295+
Coolpad7295
2.2.2, 2.3.5
4.2.2，4.1.1
2.3.3-2.3.5
2.1-update1
A890 双卡版
A916, A990
2.3.5 V69Q版
C990, C995
N710E, N720E
2.2.2-2.3.7
E860, E920
P85, P85HD
P76TI, P76e
2.3.4-4.1.1
2.3.4-2.3.7
V7/V7 mini
2.3.5-2.3.6
2.3.7（内部版本号V3110）
Dell Streak
2.2, 2.2.1
Dell Streak Pro (V04B)
4.2.1,4.4.4
夏普,SH8268U
夏普,SH320T
现代 H6, H9
诺亚信 A700, A800, A808
齐乐 A50, A70
BenWee 5100S
亿通 T700, T720, T800
广信 E920, EF68
2.3.4, 2.3.5
金立 TD500
金立 GN700W
欧博信 P818, iMO888
2.3.4-2.3.6
E派 W50L, W58, W66A, V6, N4
世纪星 G18
赛博宇华 W108
朵唯 D700, D720
2.3.4-2.3.5
至尊宝 TD818
欧乐酷 A66
HONGWEI G518
唯乐 Vx910
欧新 U2, U3, U6
京凯达 D3000
知己迅联 GL9605
和信 N300, N800
2.3.1-2.3.4
欧奇 OKA13
格莱特 W90
兴华宝 G998
原道 N12, N50, N70, N90
4.0.4-4.1.1
AUX M959P, 910+
2.3.4-2.3.6
HKC K3528 Cross 克洛斯
东信 MTW20
2.3.4-4.0.4
Easytel A22W, N23
2.3.4-2.3.5
联银通 SC998
西维 N609, N611
亿和源 P1000
飞盈 IHD858
五元素 iFive X
誉品 P880S
西姆克 I9300
同威 S8510
普耐尔 MOMO11 极速版
山水 QXL350
维纳斯 V8 Note
WPHONE8 et13-gb
优思 W999, S6000
2.3.5-2.3.6
百分百 W9300A
PC936 瑞芯微方案
世纪天元 TE800S
2.3.5-4.0.4
星之语 TSC A3
Sophone T1301, T7303 高仿IP4
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MC919LL 高仿IP4
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