X-3=-2x-21

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Solution for X-3=-2x-21 equation: 



X-3=-2X-21

We move all terms to the left:

X-3-(-2X-21)=0

We get rid of parentheses

X+2X+21-3=0

We add all the numbers together, and all the variables

3X+18=0

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

3X=-18

X=-18/3

X=-6

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