Question 116271
Let  daughter's age = x yrs.
Then, mother's age = (3x + 6) yrs.

x + (3x + 6) = 46
4x = 46 - 6 = 40 
x = 40/4 =10


3x+6 = 36 = mother's age; x = 10 = daughter's age

This is the correct answer!
Mother's age is (3x + 6) yrs. NOT 3x yrs.