-7(-3+4a)=105

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Solution for -7(-3+4a)=105 equation: 



-7(-3+4a)=105

We move all terms to the left:

-7(-3+4a)-(105)=0

We add all the numbers together, and all the variables

-7(4a-3)-105=0

We multiply parentheses

-28a+21-105=0

We add all the numbers together, and all the variables

-28a-84=0

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

-28a=84

a=84/-28

a=-3

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