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9+15=3+5x
We move all terms to the left:
9+15-(3+5x)=0
We add all the numbers together, and all the variables
-(5x+3)+9+15=0
We add all the numbers together, and all the variables
-(5x+3)+24=0
We get rid of parentheses
-5x-3+24=0
We add all the numbers together, and all the variables
-5x+21=0
We move all terms containing x to the left, all other terms to the right
-5x=-21
x=-21/-5
x=4+1/5
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