WAEC Mathematics 2018 Theory — Question 4

Question 4 of 23 from the West African Examinations Council (WAEC) Mathematics 2018 Theory paper, with the correct answer and a full explanation.

2.(b) When will the sum of their ages be 45?

Model answer

(13+n)+(10+n)=45 → 23+2n=45 → 2n=22 → n=11. The sum of their ages will be 45 in 11 years.

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