Question

the sum of two numbers is 100. if one number is 20, what is the other number

Answer 1

here is
first thing I want to told you Sum means the total number.

the sum of of two numbers is 100,

one number is already given

therefore let the another number be x

hence ,

x+20= 100

x = 100-20

x =. 80

therefore the another number is 80.

I hope you like it.

Answer 2

Sum of two no. =100
If one no. =20
Let the other no. be x
=>x+20=100
=>x=100-20
=>x=80