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0.15x+0.05(12-x)=0.10(12)
We move all terms to the left:
0.15x+0.05(12-x)-(0.10(12))=0
We add all the numbers together, and all the variables
0.15x+0.05(-1x+12)-(0.1012)=0
We add all the numbers together, and all the variables
0.15x+0.05(-1x+12)-0.1012=0
We multiply parentheses
0.15x-0.05x+0.6-0.1012=0
We add all the numbers together, and all the variables
0.1x+0.4988=0
We move all terms containing x to the left, all other terms to the right
0.1x=-0.4988
x=-0.4988/0.1
x=-4+0.0988/0.1
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