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1.68+15x=21.78
We move all terms to the left:
1.68+15x-(21.78)=0
We add all the numbers together, and all the variables
15x-20.1=0
We move all terms containing x to the left, all other terms to the right
15x=20.1
x=20.1/15
x=1+1/2.9411764705882
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