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3x+10+4x=5x-7
We move all terms to the left:
3x+10+4x-(5x-7)=0
We add all the numbers together, and all the variables
7x-(5x-7)+10=0
We get rid of parentheses
7x-5x+7+10=0
We add all the numbers together, and all the variables
2x+17=0
We move all terms containing x to the left, all other terms to the right
2x=-17
x=-17/2
x=-8+1/2
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