9y+7(y-4)=100

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Solution for 9y+7(y-4)=100 equation: 



9y+7(y-4)=100

We move all terms to the left:

9y+7(y-4)-(100)=0

We multiply parentheses

9y+7y-28-100=0

We add all the numbers together, and all the variables

16y-128=0

We move all terms containing y to the left, all other terms to the right

16y=128

y=128/16

y=8

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