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.20(10)=0.05x+0.40(10-x)
We move all terms to the left:
.20(10)-(0.05x+0.40(10-x))=0
We add all the numbers together, and all the variables
-(0.05x+0.40(-1x+10))+.2010=0
We add all the numbers together, and all the variables
-(0.05x+0.40(-1x+10))+0.201=0
We calculate terms in parentheses: -(0.05x+0.40(-1x+10)), so:We get rid of parentheses
0.05x+0.40(-1x+10)
We multiply parentheses
0.05x-0.4x+4
We add all the numbers together, and all the variables
-0.35x+4
Back to the equation:
-(-0.35x+4)
0.35x-4+0.201=0
We add all the numbers together, and all the variables
0.35x-3.799=0
We move all terms containing x to the left, all other terms to the right
0.35x=3.799
x=3.799/0.35
x=10+0.299/0.35
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