What value of x is the solution to x/3 + x/5 = 8?

Question

8/3 + 8/5

answer is 15

Why is the answer 15? What do I do to get that?

Answer 1

15/3 + 15/5 = 5+3 = 8

x/3 + x/5 = 8

multiply by 15

5x +3x = 120

8x = 120

x = 120/8 = 15

but

8/3 + 8/5

= 40/15 + 24/15

= 64/15

= 4 4.15