9a+4-2(a-13)=25

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Solution for 9a+4-2(a-13)=25 equation: 



9a+4-2(a-13)=25

We move all terms to the left:

9a+4-2(a-13)-(25)=0

We add all the numbers together, and all the variables

9a-2(a-13)-21=0

We multiply parentheses

9a-2a+26-21=0

We add all the numbers together, and all the variables

7a+5=0

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

7a=-5

a=-5/7

a=-5/7

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