21+7x=-8x+51

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Solution for 21+7x=-8x+51 equation: 



21+7x=-8x+51

We move all terms to the left:

21+7x-(-8x+51)=0

We get rid of parentheses

7x+8x-51+21=0

We add all the numbers together, and all the variables

15x-30=0

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

15x=30

x=30/15

x=2

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