Question

mother's age is three times her daughter's age. after 10 years it will be twice the daughter's age . find the parents age​

Answer 1

Answer:

30

Step-by-step explanation:

Let's say that m= mother's age and d= daughter's age.

We know that m=3d and m+10=2(d+10)

Substitute m in the second equation for 3d so that 3d+10=2(d+10), or 3d+10=2d+20.

Solve:

3d+10=2d+20

3d-2d+10=2d-2d+20

d+10=20

d+10-10=20-10

d=10

Since m=3d, and d=10,

m=3·10

m=30

Answer 2

EXPLANATION :-

let the age of daughter be 'x'

then the age of mother be (3 × x)

after 10 yrs,

age of daughter = (x + 10)

age of mother = 2(x + 10)

ATP

3x = 2(x + 10)

3x = 2x + 10

3x – 2x = 10

x = 10

hence, the age of daughter = 10 years

therefore, the age of mother = (3 × 10) yrs = 30 years

THNKS!!