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1200+1.10x=2.5
We move all terms to the left:
1200+1.10x-(2.5)=0
We add all the numbers together, and all the variables
1.10x+1197.5=0
We move all terms containing x to the left, all other terms to the right
1.10x=-1197.5
x=-1197.5/1.10
x=-1088+0.69999999999982/1.10
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