Question

Two numbers have a sum of 1,212 and a difference of 518. Which system of equations could we use to solve this problem?

A. x+y=1212
x-y=518
B. 2x+y=1212
y-x=518
C. x=1212-518
y=518
D. x-y=1212
x+y=518

Answer 1

The Answer is A. I'm answering if someone need an explanation.

Explanation:

If you read the question carefully you can see that first it says sum, sum is the answer of 2 numbers added like 2 + 2 = 4 so the first line will be

x + y = 1,212

and because only after sum it says difference, difference is an answer of two numbers that were subtracted like 2 - 2 = 0, that means that the second line is

x - y = 518

Answer will be:

x + y = 1,212

x - y = 518

Hope I helped some1)

Answer 2

The answer is A. Let me know if you need an explaination.