Question

The sum of ages of kwaku and kojo is 30 years kwaku is 4 years older than kojo. How old is kojo

Answer 1

x = 17, y = 13

Explanation:

Let the age of kwaku be x and kojo be y.

Condition 1:

x + y = 30 -------------(1)

Condition 2:

x = 4 + y --------------(2)

Put Eq. (2) in Eq. (1)

4 + y + y = 30

4 + 2y = 30

• Subtract 4 from both sides

2y = 30 - 4

2y = 26

• Divide both sides by 2

y = 26 / 2

y = 13

Put y = 13 in Eq. (2)

x = 13 + 4

x = 17

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