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0.9x+0.05(20-x)=0.10(27)
We move all terms to the left:
0.9x+0.05(20-x)-(0.10(27))=0
We add all the numbers together, and all the variables
0.9x+0.05(-1x+20)-(0.1027)=0
We add all the numbers together, and all the variables
0.9x+0.05(-1x+20)-0.1027=0
We multiply parentheses
0.9x-0.05x+1-0.1027=0
We add all the numbers together, and all the variables
0.85x+0.8973=0
We move all terms containing x to the left, all other terms to the right
0.85x=-0.8973
x=-0.8973/0.85
x=-1+0.0473/0.85
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