8x=90-7x

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Solution for 8x=90-7x equation: 



8x=90-7x

We move all terms to the left:

8x-(90-7x)=0

We add all the numbers together, and all the variables

8x-(-7x+90)=0

We get rid of parentheses

8x+7x-90=0

We add all the numbers together, and all the variables

15x-90=0

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

15x=90

x=90/15

x=6

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