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(39x)x2+0.25=120
We move all terms to the left:
(39x)x2+0.25-(120)=0
We add all the numbers together, and all the variables
39xx2-119.75=0
We move all terms containing x to the left, all other terms to the right
39xx2=119.75
x=119.75/1
x=119.75
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