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0.4x-0.2(50+x)=0.3(40)
We move all terms to the left:
0.4x-0.2(50+x)-(0.3(40))=0
We add all the numbers together, and all the variables
0.4x-0.2(x+50)-(0.34)=0
We add all the numbers together, and all the variables
0.4x-0.2(x+50)-0.34=0
We multiply parentheses
0.4x-0.2x-10-0.34=0
We add all the numbers together, and all the variables
0.2x-10.34=0
We move all terms containing x to the left, all other terms to the right
0.2x=10.34
x=10.34/0.2
x=51+0.14/0.2
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