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12x+4-x-3x=5.2^2
We move all terms to the left:
12x+4-x-3x-(5.2^2)=0
We add all the numbers together, and all the variables
8x-23.04=0
We move all terms containing x to the left, all other terms to the right
8x=23.04
x=23.04/8
x=2+6.7692307692308/7.6923076923077
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