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2.5x-7.2=1.8
We move all terms to the left:
2.5x-7.2-(1.8)=0
We add all the numbers together, and all the variables
2.5x-9=0
We move all terms containing x to the left, all other terms to the right
2.5x=9
x=9/2.5
x=3+1/1.66666666667
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