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2.5x+21=3.75+10
We move all terms to the left:
2.5x+21-(3.75+10)=0
We add all the numbers together, and all the variables
2.5x+21-(13.75)=0
We add all the numbers together, and all the variables
2.5x+7.25=0
We move all terms containing x to the left, all other terms to the right
2.5x=-7.25
x=-7.25/2.5
x=-2+1/1.1111111111111
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