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0.10x+0.05(40-x)=3.35
We move all terms to the left:
0.10x+0.05(40-x)-(3.35)=0
We add all the numbers together, and all the variables
0.10x+0.05(-1x+40)-(3.35)=0
We add all the numbers together, and all the variables
0.10x+0.05(-1x+40)-3.35=0
We multiply parentheses
0.10x-0.05x+2-3.35=0
We add all the numbers together, and all the variables
0.05x-1.35=0
We move all terms containing x to the left, all other terms to the right
0.05x=1.35
x=1.35/0.05
x=27
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