(2y+30)-(4y-30)=90

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Solution for (2y+30)-(4y-30)=90 equation: 



(2y+30)-(4y-30)=90

We move all terms to the left:

(2y+30)-(4y-30)-(90)=0

We get rid of parentheses

2y-4y+30+30-90=0

We add all the numbers together, and all the variables

-2y-30=0

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

-2y=30

y=30/-2

y=-15

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