5x+21=2x-7

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Solution for 5x+21=2x-7 equation: 



5x+21=2x-7

We move all terms to the left:

5x+21-(2x-7)=0

We get rid of parentheses

5x-2x+7+21=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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