Question

Choose the system of equations that best represents the situation below:

The sum of two numbers is 25 choose the system that best represents the situation below and their difference is 7. Find the two numbers.
A. x + y = 18

B.x + y = 25
2 + y = 7

C. x - y = 25
2 - y = 7

D. x+y= 25
x - y = 7

Answer 1

Answer: x = 16, y = 9

D. x + y = 25

x - y = 7

Explanation:

Let x be a number and y be another. First, I will write the problem out using equations. Then I can solve by graphing, see attached. Their point of intersection is the answer, x = 16 and y = 9.

The sum of two numbers is 25

x + y = 25

Their difference is 7

x - y = 7

D. x + y = 25

x - y = 7