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0.4x-0.2(40+x)=0.4(50)
We move all terms to the left:
0.4x-0.2(40+x)-(0.4(50))=0
We add all the numbers together, and all the variables
0.4x-0.2(x+40)-(0.45)=0
We add all the numbers together, and all the variables
0.4x-0.2(x+40)-0.45=0
We multiply parentheses
0.4x-0.2x-8-0.45=0
We add all the numbers together, and all the variables
0.2x-8.45=0
We move all terms containing x to the left, all other terms to the right
0.2x=8.45
x=8.45/0.2
x=42+0.049999999999999/0.2
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