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18=7-5x+3+3x
We move all terms to the left:
18-(7-5x+3+3x)=0
We add all the numbers together, and all the variables
-(-2x+10)+18=0
We get rid of parentheses
2x-10+18=0
We add all the numbers together, and all the variables
2x+8=0
We move all terms containing x to the left, all other terms to the right
2x=-8
x=-8/2
x=-4
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