7x-80=x+100

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Solution for 7x-80=x+100 equation: 



7x-80=x+100

We move all terms to the left:

7x-80-(x+100)=0

We get rid of parentheses

7x-x-100-80=0

We add all the numbers together, and all the variables

6x-180=0

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

6x=180

x=180/6

x=30

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