X*x+x-(-2x)=x*x+12

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Solution for X*x+x-(-2x)=x*x+12 equation: 



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

Wy multiply elements

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

X^2+3X-X*X-12=0

Wy multiply elements

X^2-1X^2+3X-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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