Question

The sum of Jahiem and his sister's age is 21. If Jahiem is 7 years older than his

sister, write and solve a system of equations using ) to represent Jahiem's age and s
to represent his sister's age

Answer 1

Explanation:

I think it is meant to use "j" for Jahiem's age.

so,

j + s = 21

j = s + 7

=> s + s + 7 = 21

=> 2s + 7 = 21

=> 2s = 14

=> s = 7

=> j = s + 7 = 7 + 7 = 14