X*0.4-x=20

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Solution for X*0.4-x=20 equation: 



X*0.4-X=20

We move all terms to the left:

X*0.4-X-(20)=0

We add all the numbers together, and all the variables

-1X+X*0.4-20=0

Wy multiply elements

-1X+0.4X-20=0

We add all the numbers together, and all the variables

-0.6X-20=0

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

-0.6X=20

X=20/-0.6

X=-33+0.2/0.6

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