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2(4x)+2.5x=105
We move all terms to the left:
2(4x)+2.5x-(105)=0
We add all the numbers together, and all the variables
26.5x-105=0
We move all terms containing x to the left, all other terms to the right
26.5x=105
x=105/26.5
x=3+17/17.666666666667
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