if 5 x = 6 y = z , what is x + y , in terms of z ?
"5 x = 6 y = z x = z / 5 and y = z / 6 x + y = z / 5 + z / 6 = 11 z / 30 answer is d"
divide(subtract(divide(multiply(5, const_100), const_2), const_2), add(divide(multiply(5, const_100), const_2), const_2))