Solve the following problems :
Fill in the blanks:
Anita's present age is x years. Her mother is 30 years older than Anita.
`therefore` mother's present age is ……
10 years ago, Anita's age was ……
The ratio of Anita's age to her mother's age, 10 years ago was 1:7
`therefore`.....= 1/7
`therefore` 7( ) = x+20
`therefore` 7x-70 = x+20. `therefore` 7x-...... = 20+.....
`therefore` .....= 90 `therefore` x = 15
`therefore` Anita’s present age is 15 years. `therefore` mother’s present age is.....=......years.

Explanation

(x + 30) years, (x— 10) years, (x + 20) years, x- 10, j: + 20, x- 10, x, 70, 6x, 15 + 30, 45