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2.5x-5+3x+8=18.5
We move all terms to the left:
2.5x-5+3x+8-(18.5)=0
We add all the numbers together, and all the variables
5.5x-15.5=0
We move all terms containing x to the left, all other terms to the right
5.5x=15.5
x=15.5/5.5
x=2+3/3.66666666667
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