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15=15x-9
We move all terms to the left:
15-(15x-9)=0
We get rid of parentheses
-15x+9+15=0
We add all the numbers together, and all the variables
-15x+24=0
We move all terms containing x to the left, all other terms to the right
-15x=-24
x=-24/-15
x=1+3/5
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