WAEC - Mathematics (2007 - No. 9)
I am x years old and my brother is 3 years older. How old was my brother last year
(x - 4) years
(x + 2) years
(3x - 1) years
(3x + 1) years
Vysvetlenie
If I am x years old, then my brother will be (x + 3)years old
then last year my brother was (x + 3) - 1 = (x + 2)years old