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0.15(40)+0.4x=0.2(40+x)
We move all terms to the left:
0.15(40)+0.4x-(0.2(40+x))=0
We add all the numbers together, and all the variables
0.4x-(0.2(x+40))+0.1540=0
We add all the numbers together, and all the variables
0.4x-(0.2(x+40))+0.154=0
We calculate terms in parentheses: -(0.2(x+40)), so:We get rid of parentheses
0.2(x+40)
We multiply parentheses
0.2x+8
Back to the equation:
-(0.2x+8)
0.4x-0.2x-8+0.154=0
We add all the numbers together, and all the variables
0.2x-7.846=0
We move all terms containing x to the left, all other terms to the right
0.2x=7.846
x=7.846/0.2
x=39+0.045999999999999/0.2
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