Question

The sum and difference of some pairs of numbers are given below. Can you find the numbers?
a) sum = 12 ,difference =8
b) sum =20 ,difference =5

Answer 1

Step-by-step explanation:

a. x+y=12

x=12-y

x-y=8

12-y-y=8

2y=4

y=2

x=12-2=10

b. x+y=20

x=20-y

x-y=5

20-y-y=5

2y=15

y=15/2

x=20-15/2=25/2