Question

michelle is 3 times as old as her sister tina. Tina is 4 years younger than michelle. How old is tina now?

Answer 1

Tina's age = 2 years

Explanation:

Tina's age = x

Michelle's age = 3 * x = 3x

Tina is 4 years younger than Michelle.

x = 3x - 4

Add 4 to both side

x +4 = 3x

Subtract x from both sides

4 = 3x - x

4 = 2x

Divide both sides by 2

4/2 = x

2 = x

Tina's age = 2 years