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3.75=x+2.5
We move all terms to the left:
3.75-(x+2.5)=0
We get rid of parentheses
-x-2.5+3.75=0
We add all the numbers together, and all the variables
-1x+1.25=0
We move all terms containing x to the left, all other terms to the right
-x=-1.25
x=-1.25/-1
x=1+0.25/1
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