Question

The sum of two numbers is 21, and their difference is 9. Equation 1: Equation 2:Construct a system of equaitons for the word problem.Do not solve

Answer 1

Step 1:

Let x and y represent the numbers:

Step 2

Equation 1

x + y = 21

Equation 2

x - y = 9

Final answer

x + y = 21

x - y = 9