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x+0.2x=607.74
We move all terms to the left:
x+0.2x-(607.74)=0
We add all the numbers together, and all the variables
1.2x-607.74=0
We move all terms containing x to the left, all other terms to the right
1.2x=607.74
x=607.74/1.2
x=506+0.54000000000008/1.2
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