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4x-7=12x-47
We move all terms to the left:
4x-7-(12x-47)=0
We get rid of parentheses
4x-12x+47-7=0
We add all the numbers together, and all the variables
-8x+40=0
We move all terms containing x to the left, all other terms to the right
-8x=-40
x=-40/-8
x=+5
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