5(3a+7)=20

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Solution for 5(3a+7)=20 equation: 



5(3a+7)=20

We move all terms to the left:

5(3a+7)-(20)=0

We multiply parentheses

15a+35-20=0

We add all the numbers together, and all the variables

15a+15=0

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

15a=-15

a=-15/15

a=-1

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