Réponse :
Bonsoir
1- Mike’s mother age: 4*x = 4x
Mike’s sister age: x-6
2- x is the age of Mike, so:
x + 4x + x-6 = 48
3a- solve the equation to find mike’s age:
x+4x+x-6 = 48
6x-6 = 48
6x=48+6
6x = 54
x = 54/6
x = 9
Mike is 9 years old.
b- When Mike was born, his mother was 27
(because: now she is 4*9 = 36 years old, 9 years ago, she had 36-9 = 27 years old).
