7x+7=2x+2=90

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Solution for 7x+7=2x+2=90 equation: 



7x+7=2x+2=90

We move all terms to the left:

7x+7-(2x+2)=0

We get rid of parentheses

7x-2x-2+7=0

We add all the numbers together, and all the variables

5x+5=0

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

5x=-5

x=-5/5

x=-1

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