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0.2(40)+0.15x=0.1(40)+0.2x
We move all terms to the left:
0.2(40)+0.15x-(0.1(40)+0.2x)=0
We add all the numbers together, and all the variables
0.15x-(0.2x+0.14)+0.240=0
We add all the numbers together, and all the variables
0.15x-(0.2x+0.14)+0.24=0
We get rid of parentheses
0.15x-0.2x-0.14+0.24=0
We add all the numbers together, and all the variables
-0.05x+0.1=0
We move all terms containing x to the left, all other terms to the right
-0.05x=-0.1
x=-0.1/-0.05
x=+2
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