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0.50x+0.05(20-x)=0.10(55
We move all terms to the left:
0.50x+0.05(20-x)-(0.10(55)=0
We add all the numbers together, and all the variables
0.50x+0.05(-1x+20)-(0.1055=0
We add all the numbers together, and all the variables
0.50x+0.05(-1x+20)=0
We multiply parentheses
0.50x-0.05x+1=0
We add all the numbers together, and all the variables
0.45x+1=0
We move all terms containing x to the left, all other terms to the right
0.45x=-1
x=-1/0.45
x=-2+0.1/0.45
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