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13x+7=3x+19
We move all terms to the left:
13x+7-(3x+19)=0
We get rid of parentheses
13x-3x-19+7=0
We add all the numbers together, and all the variables
10x-12=0
We move all terms containing x to the left, all other terms to the right
10x=12
x=12/10
x=1+1/5
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