7-3(-3+4a)=100

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Solution for 7-3(-3+4a)=100 equation: 



7-3(-3+4a)=100

We move all terms to the left:

7-3(-3+4a)-(100)=0

We add all the numbers together, and all the variables

-3(4a-3)+7-100=0

We add all the numbers together, and all the variables

-3(4a-3)-93=0

We multiply parentheses

-12a+9-93=0

We add all the numbers together, and all the variables

-12a-84=0

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

-12a=84

a=84/-12

a=-7

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