Question

a man is 12 years old and his sister is 2 years old.in how many years will the man be exactly twice as old as his sister?​

Answer 1

8years.

Explanation:

[12 + N] = 2[2 + N], solve for N

[12 + N] = [4 + 2N]

Subtract N from both sides

12 = 4 + N

Subtract 4 from both sides

N = 12 - 4 = 8 years from now when:

Adebe will be: 12 + 8 =20 years old

Aster = 2 + 8 = 10 years old