The sum of two numbers is 20. Their difference is 4. Write a system that describes this situation. Then solve your system by elimination to find the two numbers.

Question

Mathematics

Darien Vega

6 December, 17:56

The sum of two numbers is 20. Their difference is 4. Write a system that describes this situation. Then solve your system by elimination to find the two numbers.

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Answers (2)

Know the Answer?

Micah Knox · Answer 1

X+y = 20

x-y = 4

Solve: Add them two first - > 2x = 24 - >x = 12

So y = 8

Kaylee Pacheco · Answer 2

Call the two numbers x and y. The equations are straightforward; you can convert directly from English into math.

"The sum of the two numbers is 20": x + y = 20

"Their difference is 4": x - y = 4

Now you can solve. Adding the equations you get 2x = 24, so x = 12. That means y = 8