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15=x3x-8
We move all terms to the left:
15-(x3x-8)=0
We get rid of parentheses
-x3x+8+15=0
We add all the numbers together, and all the variables
-x3x+23=0
We move all terms containing x to the left, all other terms to the right
-x3x=-23
x=-23/1
x=-23
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