3(-6-7n)+3n=-144

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Solution for 3(-6-7n)+3n=-144 equation: 



3(-6-7n)+3n=-144

We move all terms to the left:

3(-6-7n)+3n-(-144)=0

We add all the numbers together, and all the variables

3(-7n-6)+3n-(-144)=0

We add all the numbers together, and all the variables

3n+3(-7n-6)+144=0

We multiply parentheses

3n-21n-18+144=0

We add all the numbers together, and all the variables

-18n+126=0

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

-18n=-126

n=-126/-18

n=+7

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