7x+8=8x+7=90

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Solution for 7x+8=8x+7=90 equation: 



7x+8=8x+7=90

We move all terms to the left:

7x+8-(8x+7)=0

We get rid of parentheses

7x-8x-7+8=0

We add all the numbers together, and all the variables

-1x+1=0

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

-x=-1

x=-1/-1

x=1

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