Question

What should be added to 80 to get 100

Answer 1

Answer:

20

Step-by-step explanation:

x should be added to 80 to get 100.

So, 80 + x = 100

x = 100 - 80

=> x = 20

Answer 2

Answer:

let the number added to 80 be a.

a+80=100

a=100-80

a=20