Help!!點計??

👨🏻‍🏫 學術台數學

[匿名]

2011-11-07 2:31 am

點計??
2(5x-1)=3x+5
2( )+2( )=3x+5

更新1:

跟住係??

更新2:

3-4(y+2)=y

回答 (3)

fighting gravity

2011-11-07 5:40 am

✔ 最佳答案

2(5x-1)=3x+5
2(5x)+2(-1)=3x+5
10x-2=3x+5
13x=7
x=7/13

3-4(y+2)=y
3-4y-8=y
-5=5y
y=-1

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An ESL Learner

2011-11-07 4:01 am

3 - 4(y + 2) = y
3 + (-4)(y) + (-4)(2) = y
3 - 4y - 8 = y
3 - 8 = y + 4y
-5 = 5y
y = -5/5
y = -1

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[匿名]

2011-11-07 2:40 am

2(5x-1)=3x+5
2(5x)+2(-1)=3x+5
10x-2=3x+5
7x=7
x=1

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