-21=6(3x-1)-13x

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Solution for -21=6(3x-1)-13x equation: 



-21=6(3x-1)-13x

We move all terms to the left:

-21-(6(3x-1)-13x)=0



We calculate terms in parentheses: -(6(3x-1)-13x), so:

6(3x-1)-13x

We add all the numbers together, and all the variables

-13x+6(3x-1)

We multiply parentheses

-13x+18x-6

We add all the numbers together, and all the variables

5x-6

Back to the equation:

-(5x-6)



We get rid of parentheses

-5x+6-21=0

We add all the numbers together, and all the variables

-5x-15=0

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

-5x=15

x=15/-5

x=-3

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