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0.05x+0.07(100-x)=3.2
We move all terms to the left:
0.05x+0.07(100-x)-(3.2)=0
We add all the numbers together, and all the variables
0.05x+0.07(-1x+100)-(3.2)=0
We add all the numbers together, and all the variables
0.05x+0.07(-1x+100)-3.2=0
We multiply parentheses
0.05x-0.07x+7-3.2=0
We add all the numbers together, and all the variables
-0.02x+3.8=0
We move all terms containing x to the left, all other terms to the right
-0.02x=-3.8
x=-3.8/-0.02
x=190+-4.4408920985E-16/0.02
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