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15+5x=12+5x
We move all terms to the left:
15+5x-(12+5x)=0
We add all the numbers together, and all the variables
5x-(5x+12)+15=0
We get rid of parentheses
5x-5x-12+15=0
We add all the numbers together, and all the variables
3!=0
There is no solution for this equation
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