3(55+-2y)+y=90

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Solution for 3(55+-2y)+y=90 equation: 



3(55+-2y)+y=90

We move all terms to the left:

3(55+-2y)+y-(90)=0

We add all the numbers together, and all the variables

3(-2y)+y-90=0

We add all the numbers together, and all the variables

y+3(-2y)-90=0

We multiply parentheses

y-6y-90=0

We add all the numbers together, and all the variables

-5y-90=0

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

-5y=90

y=90/-5

y=-18

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