-3a-5(1+3a)=-131

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Solution for -3a-5(1+3a)=-131 equation: 



-3a-5(1+3a)=-131

We move all terms to the left:

-3a-5(1+3a)-(-131)=0

We add all the numbers together, and all the variables

-3a-5(3a+1)-(-131)=0

We add all the numbers together, and all the variables

-3a-5(3a+1)+131=0

We multiply parentheses

-3a-15a-5+131=0

We add all the numbers together, and all the variables

-18a+126=0

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

-18a=-126

a=-126/-18

a=+7

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