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x+7+12=5x-13
We move all terms to the left:
x+7+12-(5x-13)=0
We add all the numbers together, and all the variables
x-(5x-13)+19=0
We get rid of parentheses
x-5x+13+19=0
We add all the numbers together, and all the variables
-4x+32=0
We move all terms containing x to the left, all other terms to the right
-4x=-32
x=-32/-4
x=+8
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