0.4x+0.2(100-x)=37

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Solution for 0.4x+0.2(100-x)=37 equation: 



0.4x+0.2(100-x)=37

We move all terms to the left:

0.4x+0.2(100-x)-(37)=0

We add all the numbers together, and all the variables

0.4x+0.2(-1x+100)-37=0

We multiply parentheses

0.4x-0.2x+20-37=0

We add all the numbers together, and all the variables

0.2x-17=0

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

0.2x=17

x=17/0.2

x=85

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