Good morning ☕️
______
Answer:
She is 20 years old
____________________
Step-by-step explanation:
Let x be the age of the daughter.
Let y be the age of the mother.
then , we have to solve the system:
y=2x (1)
y+20=1.5(x+20) (2)
If we substitute y by 2x in the second equation we get :
(2) 2x+20=1.5(x+20) ⇔ 2x+20=1.5x+30 ⇔ 2x-1.5x=30-20
⇔ 0.5x=10 ⇔ x=20.
By the way the mother’s s age = 40 years.
:)
