The sum of two numbers is 30 and their difference is 20

Question

Mathematics

Emma Weiss

11 August, 13:33

The sum of two numbers is 30 and their difference is 20

+5

Answers (2)

Know the Answer?

Randall Lin · Answer 1

X=25, Y=5; the numbers are 25 and 5

Step-by-step explanation:

Let the numbers be X and Y

X - Y = 20; from statement 2.

X = 20+Y

But

X + Y = 30 from statement 1;

Meaning

20 + Y + Y = 30

20 + 2Y = 30

2Y = 10

Y=5

X=20 + Y

X = 20 + 5 = 25

X=25, Y=5