21+4x=5(-x+3)-66

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Solution for 21+4x=5(-x+3)-66 equation: 



21+4x=5(-x+3)-66

We move all terms to the left:

21+4x-(5(-x+3)-66)=0

We add all the numbers together, and all the variables

4x-(5(-1x+3)-66)+21=0



We calculate terms in parentheses: -(5(-1x+3)-66), so:

5(-1x+3)-66

We multiply parentheses

-5x+15-66

We add all the numbers together, and all the variables

-5x-51

Back to the equation:

-(-5x-51)



We get rid of parentheses

4x+5x+51+21=0

We add all the numbers together, and all the variables

9x+72=0

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

9x=-72

x=-72/9

x=-8

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