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0.4x-0.2(x+40)=-0.05(40)
We move all terms to the left:
0.4x-0.2(x+40)-(-0.05(40))=0
We add all the numbers together, and all the variables
0.4x-0.2(x+40)-(-0.054)=0
We add all the numbers together, and all the variables
0.4x-0.2(x+40)+0.054=0
We multiply parentheses
0.4x-0.2x-8+0.054=0
We add all the numbers together, and all the variables
0.2x-7.946=0
We move all terms containing x to the left, all other terms to the right
0.2x=7.946
x=7.946/0.2
x=39+0.146/0.2
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