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15x=12+10x
We move all terms to the left:
15x-(12+10x)=0
We add all the numbers together, and all the variables
15x-(10x+12)=0
We get rid of parentheses
15x-10x-12=0
We add all the numbers together, and all the variables
5x-12=0
We move all terms containing x to the left, all other terms to the right
5x=12
x=12/5
x=2+2/5
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