8x-70=x+21

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Solution for 8x-70=x+21 equation: 



8x-70=x+21

We move all terms to the left:

8x-70-(x+21)=0

We get rid of parentheses

8x-x-21-70=0

We add all the numbers together, and all the variables

7x-91=0

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

7x=91

x=91/7

x=13

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