3a-(-16a)+-14a-(-12a)-15a=-12

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Solution for 3a-(-16a)+-14a-(-12a)-15a=-12 equation: 



3a-(-16a)+-14a-(-12a)-15a=-12

We move all terms to the left:

3a-(-16a)+-14a-(-12a)-15a-(-12)=0

We add all the numbers together, and all the variables

-26a-(-16a)-(-12a)+12=0

We get rid of parentheses

-26a+16a+12a+12=0

We add all the numbers together, and all the variables

2a+12=0

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

2a=-12

a=-12/2

a=-6

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