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0.5x+7=3x-18
We move all terms to the left:
0.5x+7-(3x-18)=0
We get rid of parentheses
0.5x-3x+18+7=0
We add all the numbers together, and all the variables
-2.5x+25=0
We move all terms containing x to the left, all other terms to the right
-2.5x=-25
x=-25/-2.5
x=+10
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