-5(3+3a)=105

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Solution for -5(3+3a)=105 equation: 



-5(3+3a)=105

We move all terms to the left:

-5(3+3a)-(105)=0

We add all the numbers together, and all the variables

-5(3a+3)-105=0

We multiply parentheses

-15a-15-105=0

We add all the numbers together, and all the variables

-15a-120=0

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

-15a=120

a=120/-15

a=-8

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