20-x=3(12-x)

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Solution for 20-x=3(12-x) equation: 



20-x=3(12-x)

We move all terms to the left:

20-x-(3(12-x))=0

We add all the numbers together, and all the variables

-x-(3(-1x+12))+20=0

We add all the numbers together, and all the variables

-1x-(3(-1x+12))+20=0



We calculate terms in parentheses: -(3(-1x+12)), so:

3(-1x+12)

We multiply parentheses

-3x+36

Back to the equation:

-(-3x+36)



We get rid of parentheses

-1x+3x-36+20=0

We add all the numbers together, and all the variables

2x-16=0

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

2x=16

x=16/2

x=8

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