Details pls not short answer

see explanation

Step-by-step explanation:

Given that Bilal is age y and his mother is 25 years older, then

a. Bilal's mothers age is y + 25

b. the sum of their ages = y + y + 25 = 2y + 25

c. Mother is y + 25 = 12 + 25 = 37 years

Step-by-step explanation:

a) Bilal is y years and his mother is 25 years older that he is

Bilal's mother is = 25 + y years old

b) adding Bilal and his mother's age

= y + 25 + y

= 2y + 25

c) when Bilal is 12 I.e. y = 12

His mum will be

= 12 + 25

= 37