Question

Robert is 17 years old. His father is 5 years older than his mother. Together their ages
Total 100 years. Determine the ages of his parents.

Answer 1

Answer:

let the age of mother be x

therefore, the age of father be x + 5

therefore, the age of Robert be 17

according to question

sum of all age = 100

x + x + 5 + 17 = 100

2x + 22 = 100

2x = 100 - 22

2x = 88

x = 88/2

x = 44

therefore,

the age of mother = 44..

the age of father = 44 + 5 = 49.

Answer 2

Answer:

d

Step-by-step explanation:

Let x be Robert's father's aage and let y be his mother's age

Here: First Condition: x = y + 5…(1)

Second Condition: 17 + x + y = 100…(2)

Taking Equation (2), we have

17 + x + y = 100

=> x + y = 100 - 17

=> x + y = 83

=> y + 7 + y = 83

=> 2y = 83 - 7

=> 2y = 76

=> y =