3(a-6)=-21.a=

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



3(a-6)=-21.a=

We move all terms to the left:

3(a-6)-(-21.a)=0

We add all the numbers together, and all the variables

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

We multiply parentheses

3a-(-21a)-18=0

We get rid of parentheses

3a+21a-18=0

We add all the numbers together, and all the variables

24a-18=0

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

24a=18

a=18/24

a=3/4

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