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12+5x=30.76+3x
We move all terms to the left:
12+5x-(30.76+3x)=0
We add all the numbers together, and all the variables
5x-(3x+30.76)+12=0
We get rid of parentheses
5x-3x-30.76+12=0
We add all the numbers together, and all the variables
2x-18.76=0
We move all terms containing x to the left, all other terms to the right
2x=18.76
x=18.76/2
x=9+0.76/2
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