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X-0.20X-80=0.25(80)
We move all terms to the left:
X-0.20X-80-(0.25(80))=0
We add all the numbers together, and all the variables
X-0.20X-80-(0.258)=0
We add all the numbers together, and all the variables
0.8X-80.258=0
We move all terms containing X to the left, all other terms to the right
0.8X=80.258
X=80.258/0.8
X=100+0.258/0.8
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