3(a-5)-(2a+1)=-12

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Solution for 3(a-5)-(2a+1)=-12 equation: 



3(a-5)-(2a+1)=-12

We move all terms to the left:

3(a-5)-(2a+1)-(-12)=0

We add all the numbers together, and all the variables

3(a-5)-(2a+1)+12=0

We multiply parentheses

3a-(2a+1)-15+12=0

We get rid of parentheses

3a-2a-1-15+12=0

We add all the numbers together, and all the variables

a-4=0

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

a=4

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