7(y-90)=7

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Solution for 7(y-90)=7 equation: 



7(y-90)=7

We move all terms to the left:

7(y-90)-(7)=0

We multiply parentheses

7y-630-7=0

We add all the numbers together, and all the variables

7y-637=0

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

7y=637

y=637/7

y=91

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