A mother's age is three less than three times her daughter's age. The sum of their ages is 45. What is the daughter's age?
A) 33
B) 12
C) 42
D) 15

Question

03-02-2016
Mathematics

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A mother's age is three less than three times her daughter's age. The sum of their ages is 45. What is the daughter's age?
A) 33
B) 12
C) 42
D) 15

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taskmasters taskmasters · Answer 1 · 2016-02-03T14:46:41+01:00

taskmasters taskmasters

03-02-2016

Given:
mother's age = 3x - 3
daughter's age = x
total of their ages = 45

Mother's age + daughter's age = 45
3x - 3 + x = 45
4x = 45 + 3
4x = 48
4x/4 = 48/4
x = 12 daughter's age. CHOICE B.

mother's age : 3x - 3 = 3(12) - 3 = 36 - 3 = 33

To check:
mother's age + daughter's age = 45
33 + 12 = 45
45 = 45

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A mother's age is three less than three times her daughter's age. The sum of their ages is 45. What is the daughter's age? A) 33 B) 12 C) 42 D) 15

Respuesta :

Otras preguntas

A mother's age is three less than three times her daughter's age. The sum of their ages is 45. What is the daughter's age?
A) 33
B) 12
C) 42
D) 15