180-y=7(90-y)

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Solution for 180-y=7(90-y) equation: 



180-y=7(90-y)

We move all terms to the left:

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

We add all the numbers together, and all the variables

-y-(7(-1y+90))+180=0

We add all the numbers together, and all the variables

-1y-(7(-1y+90))+180=0



We calculate terms in parentheses: -(7(-1y+90)), so:

7(-1y+90)

We multiply parentheses

-7y+630

Back to the equation:

-(-7y+630)



We get rid of parentheses

-1y+7y-630+180=0

We add all the numbers together, and all the variables

6y-450=0

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

6y=450

y=450/6

y=75

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