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25x-40=15x-47
We move all terms to the left:
25x-40-(15x-47)=0
We get rid of parentheses
25x-15x+47-40=0
We add all the numbers together, and all the variables
10x+7=0
We move all terms containing x to the left, all other terms to the right
10x=-7
x=-7/10
x=-7/10
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