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16+2.5x=22.5
We move all terms to the left:
16+2.5x-(22.5)=0
We add all the numbers together, and all the variables
2.5x-6.5=0
We move all terms containing x to the left, all other terms to the right
2.5x=6.5
x=6.5/2.5
x=2+1/1.6666666666667
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