-7(a+9)-28=49

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Solution for -7(a+9)-28=49 equation: 



-7(a+9)-28=49

We move all terms to the left:

-7(a+9)-28-(49)=0

We add all the numbers together, and all the variables

-7(a+9)-77=0

We multiply parentheses

-7a-63-77=0

We add all the numbers together, and all the variables

-7a-140=0

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

-7a=140

a=140/-7

a=-20

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