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0.50(20)+0.40x=0.20(20+x)
We move all terms to the left:
0.50(20)+0.40x-(0.20(20+x))=0
We add all the numbers together, and all the variables
0.40x-(0.20(x+20))+0.5020=0
We add all the numbers together, and all the variables
0.40x-(0.20(x+20))+0.502=0
We calculate terms in parentheses: -(0.20(x+20)), so:We get rid of parentheses
0.20(x+20)
We multiply parentheses
0.2x+4
Back to the equation:
-(0.2x+4)
0.40x-0.2x-4+0.502=0
We add all the numbers together, and all the variables
0.2x-3.498=0
We move all terms containing x to the left, all other terms to the right
0.2x=3.498
x=3.498/0.2
x=17+0.098/0.2
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