Question

What is the answer? xy = 30 and x + y = 18

Answer 1

from second equation y = 18-x so:-

x(18 - x) = 30

x^2 - 18x + 30 = 0

x = 16.14, 1.86

when x = 16.14 y = 18-16.14 = 1.86

when x = 1.86, y = 16.14

so one variable = 16.14 and the other = 1.86 Answer