15+2(a-4)=-13

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Solution for 15+2(a-4)=-13 equation: 



15+2(a-4)=-13

We move all terms to the left:

15+2(a-4)-(-13)=0

We add all the numbers together, and all the variables

2(a-4)+28=0

We multiply parentheses

2a-8+28=0

We add all the numbers together, and all the variables

2a+20=0

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

2a=-20

a=-20/2

a=-10

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