(3y+20)+y=180

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Solution for (3y+20)+y=180 equation: 



(3y+20)+y=180

We move all terms to the left:

(3y+20)+y-(180)=0

We add all the numbers together, and all the variables

y+(3y+20)-180=0

We get rid of parentheses

y+3y+20-180=0

We add all the numbers together, and all the variables

4y-160=0

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

4y=160

y=160/4

y=40

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