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2.5x-5.0=7.5
We move all terms to the left:
2.5x-5.0-(7.5)=0
We add all the numbers together, and all the variables
2.5x-12.5=0
We move all terms containing x to the left, all other terms to the right
2.5x=12.5
x=12.5/2.5
x=5
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