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