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0.75x-0.1x=80
We move all terms to the left:
0.75x-0.1x-(80)=0
We add all the numbers together, and all the variables
0.65x-80=0
We move all terms containing x to the left, all other terms to the right
0.65x=80
x=80/0.65
x=123+0.049999999999997/0.65
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