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7x+42=13x+38
We move all terms to the left:
7x+42-(13x+38)=0
We get rid of parentheses
7x-13x-38+42=0
We add all the numbers together, and all the variables
-6x+4=0
We move all terms containing x to the left, all other terms to the right
-6x=-4
x=-4/-6
x=2/3
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