13a-4(2a-5)=15

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Solution for 13a-4(2a-5)=15 equation: 



13a-4(2a-5)=15

We move all terms to the left:

13a-4(2a-5)-(15)=0

We multiply parentheses

13a-8a+20-15=0

We add all the numbers together, and all the variables

5a+5=0

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

5a=-5

a=-5/5

a=-1

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