Question

sister's age is 3 times that of her brother. After 5 years the
sister shall be twice as old as her brother, How many years before
the sisters age was 6 times of her brother's age?​

Answer 1

Answer:

3

Step-by-step explanation:

Let sisters age be 3x and brothers age be x

3x+5 = 2(x+5)

3x+5 = 2x+10

3x-2x = 10-5

x = 5

3x = 5 * 3 = 15

Brother is 5 years old and sister is 15 years old

Before 3 years [guess] their ages were 2 and 12

Answer 2

Answer:

Step-by-step explanation:

Answer:

3

Step-by-step explanation:

Let sisters age be 3x and brothers age be x

3x+5 = 2(x+5)

3x+5 = 2x+10

3x-2x = 10-5

x = 5

3x = 5 * 3 = 15

Brother is 5 years old and sister is 15 years old

Before 3 years [guess] their ages were 2 and 12

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