Question

The sum of two numbers is 100 and their difference is 80 what are the two numbers?

Answer 1

Answer:

sum = 100

I = 80

difference = ( total sum -80)

100 - 80 = 20

II = 20

Answer 2

Answer:

the numbers are 90 and 10

Step-by-step explanation:

step 1

let the numbers be x and y

Step 2

x+y =100

x-y=80

add both Lhs and Rhs

x+y+x-y=100+80

2x=180

x=90

x+y=100

90+y=100

y=10