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-3=x-15.7
We move all terms to the left:
-3-(x-15.7)=0
We get rid of parentheses
-x+15.7-3=0
We add all the numbers together, and all the variables
-1x+12.7=0
We move all terms containing x to the left, all other terms to the right
-x=-12.7
x=-12.7/-1
x=12+0.7/1
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