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1.10x-2.5x=-1200
We move all terms to the left:
1.10x-2.5x-(-1200)=0
We add all the numbers together, and all the variables
-1.4x+1200=0
We move all terms containing x to the left, all other terms to the right
-1.4x=-1200
x=-1200/-1.4
x=857+0.2/1.4
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