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7x-15=15-10x
We move all terms to the left:
7x-15-(15-10x)=0
We add all the numbers together, and all the variables
7x-(-10x+15)-15=0
We get rid of parentheses
7x+10x-15-15=0
We add all the numbers together, and all the variables
17x-30=0
We move all terms containing x to the left, all other terms to the right
17x=30
x=30/17
x=1+13/17
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