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

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



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

We move all terms to the left:

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

We multiply parentheses

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

We add all the numbers together, and all the variables

10a-90=0

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

10a=90

a=90/10

a=9

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