5x-7=8x+21

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Solution for 5x-7=8x+21 equation: 



5x-7=8x+21

We move all terms to the left:

5x-7-(8x+21)=0

We get rid of parentheses

5x-8x-21-7=0

We add all the numbers together, and all the variables

-3x-28=0

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

-3x=28

x=28/-3

x=-9+1/3

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