-6(8a-6)+3(3-6a)=-21

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Solution for -6(8a-6)+3(3-6a)=-21 equation: 



-6(8a-6)+3(3-6a)=-21

We move all terms to the left:

-6(8a-6)+3(3-6a)-(-21)=0

We add all the numbers together, and all the variables

-6(8a-6)+3(-6a+3)-(-21)=0

We add all the numbers together, and all the variables

-6(8a-6)+3(-6a+3)+21=0

We multiply parentheses

-48a-18a+36+9+21=0

We add all the numbers together, and all the variables

-66a+66=0

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

-66a=-66

a=-66/-66

a=1

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