0.50x+0.30(100-x)=40

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Solution for 0.50x+0.30(100-x)=40 equation: 



0.50x+0.30(100-x)=40

We move all terms to the left:

0.50x+0.30(100-x)-(40)=0

We add all the numbers together, and all the variables

0.50x+0.30(-1x+100)-40=0

We multiply parentheses

0.50x-0.3x+30-40=0

We add all the numbers together, and all the variables

0.2x-10=0

We move all terms containing x to the left, all other terms to the right

0.2x=10

x=10/0.2

x=50

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