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4x^+12x=+135
We move all terms to the left:
4x^+12x-(+135)=0
We add all the numbers together, and all the variables
4x^+12x-135=0
We add all the numbers together, and all the variables
16x-135=0
We move all terms containing x to the left, all other terms to the right
16x=135
x=135/16
x=8+7/16
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