X+3x-12+x+4=x+28

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Solution for X+3x-12+x+4=x+28 equation: 



X+3X-12+X+4=X+28

We move all terms to the left:

X+3X-12+X+4-(X+28)=0

We add all the numbers together, and all the variables

5X-(X+28)-8=0

We get rid of parentheses

5X-X-28-8=0

We add all the numbers together, and all the variables

4X-36=0

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

4X=36

X=36/4

X=9

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