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7+2x=13+3x
We move all terms to the left:
7+2x-(13+3x)=0
We add all the numbers together, and all the variables
2x-(3x+13)+7=0
We get rid of parentheses
2x-3x-13+7=0
We add all the numbers together, and all the variables
-1x-6=0
We move all terms containing x to the left, all other terms to the right
-x=6
x=6/-1
x=-6
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