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-2x+12=2x-45
We move all terms to the left:
-2x+12-(2x-45)=0
We get rid of parentheses
-2x-2x+45+12=0
We add all the numbers together, and all the variables
-4x+57=0
We move all terms containing x to the left, all other terms to the right
-4x=-57
x=-57/-4
x=14+1/4
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