Answer
Success!
a=12

↓Steps Explained:↓

Solve for a

a + 4a = 60

Group the a terms on the left:

(1 + 4)a = 5a

Form modified equation

5a = + 60

Divide each side of the equation by 5

5a
5
=
  
60
5

a = 12

Final Answer

a=12
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