Sipho is 4 years older than his sister.Their combined age is 18.How old is sipho?

Answer 1

s + s + 4 = 18
2s = 14
s = 7

The sister is 7 years old.

Answer 2

Sipho=4x
Sister=x

x+x+4=18
2x=14
x=7

4(7)=28

Answer 3

What is this?

4(7)=28