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15-13x=7x-23
We move all terms to the left:
15-13x-(7x-23)=0
We get rid of parentheses
-13x-7x+23+15=0
We add all the numbers together, and all the variables
-20x+38=0
We move all terms containing x to the left, all other terms to the right
-20x=-38
x=-38/-20
x=1+9/10
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