-4+5=-8x+21

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Solution for -4+5=-8x+21 equation: 



-4+5=-8x+21

We move all terms to the left:

-4+5-(-8x+21)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

8x-21+1=0

We add all the numbers together, and all the variables

8x-20=0

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

8x=20

x=20/8

x=2+1/2

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