3x-4(-6x-15)=-21

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Solution for 3x-4(-6x-15)=-21 equation: 



3x-4(-6x-15)=-21

We move all terms to the left:

3x-4(-6x-15)-(-21)=0

We add all the numbers together, and all the variables

3x-4(-6x-15)+21=0

We multiply parentheses

3x+24x+60+21=0

We add all the numbers together, and all the variables

27x+81=0

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

27x=-81

x=-81/27

x=-3

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