15-x=20,x

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Solution for 15-x=20,x equation: 



15-x=20.x

We move all terms to the left:

15-x-(20.x)=0

We add all the numbers together, and all the variables

-x-(+20.x)+15=0

We add all the numbers together, and all the variables

-1x-(+20.x)+15=0

We get rid of parentheses

-1x-20.x+15=0

We add all the numbers together, and all the variables

-21x+15=0

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

-21x=-15

x=-15/-21

x=5/7

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