Edith is x years old. Her sister, Madison is six years older than her. Their mother is twice as old as Madison. Their aunt, Elizabeth is x years older than their mother. Write and simplify an expression that represents Elizabeth's age in years.

Step-by-step explanation:

Edith is x years old.

Her sister, Madison is six years older than her. This means that the age of Madison is x + 6

Their mother is twice as old as Madison. This means that the age of their mother is expressed as

2 (x + 6)

= 2x + 12

Their aunt, Elizabeth is x years older than their mother. This means that the expression that represents Elizabeth's age in years is

2x + 12 + x

= 3x + 12