What is the linear equation of this problem.fans cost php 8 each, buttons cost php 12 each, fans and buttons need to sell php 1200?

Answer 1

I doubt anyone should be answering this, but: 8 + 12 = 20. 1200 / 20 = 60 combinations.  Likely 60 units.

Answer 2

8F + 12B  =  1200             . . . . F = number of fans, B = number of buttons