21=-6(x)-3

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Solution for 21=-6(x)-3 equation: 



21=-6(x)-3

We move all terms to the left:

21-(-6(x)-3)=0

We get rid of parentheses

6x+3+21=0

We add all the numbers together, and all the variables

6x+24=0

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

6x=-24

x=-24/6

x=-4

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