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x-0.2x=56.72
We move all terms to the left:
x-0.2x-(56.72)=0
We add all the numbers together, and all the variables
0.8x-56.72=0
We move all terms containing x to the left, all other terms to the right
0.8x=56.72
x=56.72/0.8
x=70+0.72/0.8
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