x*40+(1-x)*18=20

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Solution for x*40+(1-x)*18=20 equation: 



x*40+(1-x)*18=20

We move all terms to the left:

x*40+(1-x)*18-(20)=0

We add all the numbers together, and all the variables

x*40+(-1x+1)*18-20=0

We multiply parentheses

x*40-18x+18-20=0

Wy multiply elements

40x-18x+18-20=0

We add all the numbers together, and all the variables

22x-2=0

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

22x=2

x=2/22

x=1/11

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