7(4+6a)=-21

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Solution for 7(4+6a)=-21 equation: 



7(4+6a)=-21

We move all terms to the left:

7(4+6a)-(-21)=0

We add all the numbers together, and all the variables

7(6a+4)-(-21)=0

We add all the numbers together, and all the variables

7(6a+4)+21=0

We multiply parentheses

42a+28+21=0

We add all the numbers together, and all the variables

42a+49=0

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

42a=-49

a=-49/42

a=-1+1/6

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