3(2a+5)+4(3a+1)=109.

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Solution for 3(2a+5)+4(3a+1)=109. equation: 



3(2a+5)+4(3a+1)=109.

We move all terms to the left:

3(2a+5)+4(3a+1)-(109.)=0

We add all the numbers together, and all the variables

3(2a+5)+4(3a+1)-109=0

We multiply parentheses

6a+12a+15+4-109=0

We add all the numbers together, and all the variables

18a-90=0

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

18a=90

a=90/18

a=5

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