Question

Construct a system of equations for the word problem. Do not solve. In the space provided, type the answer without any space between the letters, numbers, or symbols.

Answer 1

Given:

The sum of two numbers is 21, and their difference is 9.

Let x and y be the two numbers.

Equation 1: The sum of two numbers is 21.

$\text{ x + y = 21}$

Equation 2: Their difference is 9.

$\text{ x - y = 9}$