
Example: Two numbers are in the ratio of 2 to 5. Their sum is 70. Find the two numbers. Solution: Let the two numbers be 'x' and 'y'. Given: The ratio of two numbers is 2 to 5 therefore x/y = 2/5 their sum is 70: x + y = 70 solving two equations: x/y = 2/5 => 5x = 2y x + y = 70 substituting x = 2y/5 in x + y = 70 x + y = 70 2y/5 + y = 70 multiply whole equation by 5 2y + 5y = 350 7y = 350 y = 50 x = 70  y = 70  50 = 20 Directions: Choose the correct answer. 