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120+6.25x=3380
We move all terms to the left:
120+6.25x-(3380)=0
We add all the numbers together, and all the variables
6.25x-3260=0
We move all terms containing x to the left, all other terms to the right
6.25x=3260
x=3260/6.25
x=521+1/1.6666666666667
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