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0.20x+0.05(20-x)=0.10(-14)
We move all terms to the left:
0.20x+0.05(20-x)-(0.10(-14))=0
We add all the numbers together, and all the variables
0.20x+0.05(-1x+20)-(0.10(-14))=0
We add all the numbers together, and all the variables
0.20x+0.05(-1x+20)+1.4=0
We multiply parentheses
0.20x-0.05x+1+1.4=0
We add all the numbers together, and all the variables
0.15x+2.4=0
We move all terms containing x to the left, all other terms to the right
0.15x=-2.4
x=-2.4/0.15
x=-16
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