**(a) Arif is 2****x**** years old. His father is 4 times as old as he. His mother is 3 years younger than his father. What is their total age in terms of ****x****?****(b) If ****x**** is = 4, find their total age.****Solution****(a)**

Arif --> 2*x *

Father --> 4 x 2*x* = 8*x*

Mother --> 8*x* - 3

Total --> 2*x* + 8*x* + 8*x* - 3 = 18*x* - 3

**Answer: (18 x - 3) years**

**(b)**

18(4) - 3

= 72 - 3

= 69

**Answer: 69 years**

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