8x+7=21x-1

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Solution for 8x+7=21x-1 equation: 



8x+7=21x-1

We move all terms to the left:

8x+7-(21x-1)=0

We get rid of parentheses

8x-21x+1+7=0

We add all the numbers together, and all the variables

-13x+8=0

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

-13x=-8

x=-8/-13

x=8/13

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