The sum of two numbers is 78. If the smaller number is 12 less than one- fifth of the larger number, find the two numbers.

Attempt 1

a + a + 12 - a/5 = 78

5a + 5a + (5)12 - (5) a/5 = 78 * 5

5a + 5a + 60 - a = 390

9a = 390 - 60

9a = 330

a = 3.66

Attempt 2

A + 12 (1/5)a = 78 :

I think the second attempt is completely wrong