(a*5)+(a*9)=7*(5+9)

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Solution for (a*5)+(a*9)=7*(5+9) equation: 



(a*5)+(a*9)=7(5+9)

We move all terms to the left:

(a*5)+(a*9)-(7(5+9))=0

We add all the numbers together, and all the variables

(+a*5)+(+a*9)-(714)=0

We add all the numbers together, and all the variables

(+a*5)+(+a*9)-714=0

We get rid of parentheses

a*5+a*9-714=0

Wy multiply elements

5a+9a-714=0

We add all the numbers together, and all the variables

14a-714=0

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

14a=714

a=714/14

a=51

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