5a+2(3+a)=20

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Solution for 5a+2(3+a)=20 equation: 



5a+2(3+a)=20

We move all terms to the left:

5a+2(3+a)-(20)=0

We add all the numbers together, and all the variables

5a+2(a+3)-20=0

We multiply parentheses

5a+2a+6-20=0

We add all the numbers together, and all the variables

7a-14=0

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

7a=14

a=14/7

a=2

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