X/9=20-x

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Solution for X/9=20-x equation: 



X/9=20-X

We move all terms to the left:

X/9-(20-X)=0

We add all the numbers together, and all the variables

X/9-(-1X+20)=0

We get rid of parentheses

X/9+1X-20=0

We multiply all the terms by the denominator


X+1X*9-20*9=0

We add all the numbers together, and all the variables

X+1X*9-180=0

Wy multiply elements

X+9X-180=0

We add all the numbers together, and all the variables

10X-180=0

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

10X=180

X=180/10

X=18

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