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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

12x-(3(-1x+20))+240=0



We calculate terms in parentheses: -(3(-1x+20)), so:

3(-1x+20)

We multiply parentheses

-3x+60

Back to the equation:

-(-3x+60)



We get rid of parentheses

12x+3x-60+240=0

We add all the numbers together, and all the variables

15x+180=0

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

15x=-180

x=-180/15

x=-12

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