21(2-x)=-9(x+3)

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Solution for 21(2-x)=-9(x+3) equation: 



21(2-x)=-9(x+3)

We move all terms to the left:

21(2-x)-(-9(x+3))=0

We add all the numbers together, and all the variables

21(-1x+2)-(-9(x+3))=0

We multiply parentheses

-21x-(-9(x+3))+42=0



We calculate terms in parentheses: -(-9(x+3)), so:

-9(x+3)

We multiply parentheses

-9x-27

Back to the equation:

-(-9x-27)



We get rid of parentheses

-21x+9x+27+42=0

We add all the numbers together, and all the variables

-12x+69=0

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

-12x=-69

x=-69/-12

x=5+3/4

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