Question

- The sum of three numbers is 918. One of the numbers, x, is twice as much as the sum of the

other two numbers. What is the value of x?

Answer 1

x = 612

Explanation:

x = 2(y + z) Divide by 2 to isolate y + z

x/2 = y + z Set up the sum of three numbers

x + y + z = 918 Substitute x / 2 for y + z

x + x/2 = 918 Combine like terms

3/2 x = 918 Multiply both sides by 2/3

2/3 * 3x/2 = 2/3 * 918

x = 612