(2y-20)+(2y-20)+(2y-20)+(2y-20)+y+y=720

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Solution for (2y-20)+(2y-20)+(2y-20)+(2y-20)+y+y=720 equation: 



(2y-20)+(2y-20)+(2y-20)+(2y-20)+y+y=720

We move all terms to the left:

(2y-20)+(2y-20)+(2y-20)+(2y-20)+y+y-(720)=0

We add all the numbers together, and all the variables

2y+(2y-20)+(2y-20)+(2y-20)+(2y-20)-720=0

We get rid of parentheses

2y+2y+2y+2y+2y-20-20-20-20-720=0

We add all the numbers together, and all the variables

10y-800=0

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

10y=800

y=800/10

y=80

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