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0.75x-x=-2.5
We move all terms to the left:
0.75x-x-(-2.5)=0
We add all the numbers together, and all the variables
-0.25x+2.5=0
We move all terms containing x to the left, all other terms to the right
-0.25x=-2.5
x=-2.5/-0.25
x=+10
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