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-2.5x=12.5
We move all terms to the left:
-2.5x-(12.5)=0
We add all the numbers together, and all the variables
-2.5x-12.5=0
We move all terms containing x to the left, all other terms to the right
-2.5x=12.5
x=12.5/-2.5
x=-5
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