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-7-5x=-18x+42
We move all terms to the left:
-7-5x-(-18x+42)=0
We get rid of parentheses
-5x+18x-42-7=0
We add all the numbers together, and all the variables
13x-49=0
We move all terms containing x to the left, all other terms to the right
13x=49
x=49/13
x=3+10/13
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