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0.20x+0.05(12-x)=0.10(3)
We move all terms to the left:
0.20x+0.05(12-x)-(0.10(3))=0
We add all the numbers together, and all the variables
0.20x+0.05(-1x+12)-(0.103)=0
We add all the numbers together, and all the variables
0.20x+0.05(-1x+12)-0.103=0
We multiply parentheses
0.20x-0.05x+0.6-0.103=0
We add all the numbers together, and all the variables
0.15x+0.497=0
We move all terms containing x to the left, all other terms to the right
0.15x=-0.497
x=-0.497/0.15
x=-3+0.047/0.15
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