X2+x-(-2x)=x2+12

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Solution for X2+x-(-2x)=x2+12 equation: 



X2+X-(-2X)=X2+12

We move all terms to the left:

X2+X-(-2X)-(X2+12)=0

We add all the numbers together, and all the variables

-(+X^2+12)+X2+X-(-2X)=0

We add all the numbers together, and all the variables

X^2-(+X^2+12)+X-(-2X)=0

We get rid of parentheses

X^2-X^2+X+2X-12=0

We add all the numbers together, and all the variables

3X-12=0

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

3X=12

X=12/3

X=4

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