3(12+y)=90

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Solution for 3(12+y)=90 equation: 



3(12+y)=90

We move all terms to the left:

3(12+y)-(90)=0

We add all the numbers together, and all the variables

3(y+12)-90=0

We multiply parentheses

3y+36-90=0

We add all the numbers together, and all the variables

3y-54=0

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

3y=54

y=54/3

y=18

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