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-15x+12=2.5x-1
We move all terms to the left:
-15x+12-(2.5x-1)=0
We get rid of parentheses
-15x-2.5x+1+12=0
We add all the numbers together, and all the variables
-17.5x+13=0
We move all terms containing x to the left, all other terms to the right
-17.5x=-13
x=-13/-17.5
x=13/17.5
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