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x+1.25x=2.5
We move all terms to the left:
x+1.25x-(2.5)=0
We add all the numbers together, and all the variables
2.25x-2.5=0
We move all terms containing x to the left, all other terms to the right
2.25x=2.5
x=2.5/2.25
x=1+0.25/2.25
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