8x+5x-40=80+7x

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Solution for 8x+5x-40=80+7x equation: 



8x+5x-40=80+7x

We move all terms to the left:

8x+5x-40-(80+7x)=0

We add all the numbers together, and all the variables

8x+5x-(7x+80)-40=0

We add all the numbers together, and all the variables

13x-(7x+80)-40=0

We get rid of parentheses

13x-7x-80-40=0

We add all the numbers together, and all the variables

6x-120=0

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

6x=120

x=120/6

x=20

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