(a)A man is 14 years older than his son. Two years later, his age will be twice that of his son. Find the age of his son now.
b-c是方程式
(b) 5 times a number is greater than 3 times the number by 4. Find the number . Solution: let x be the number.
(c) The length of a rectangle is 3 cm longer than its width. The perimeter of the
rectangle is 30 cm. Find the length of the rectangle. Solytion : Let x cm be the length of the rectangle.
呢幾條題來自Train Up MATHEMATICS 1 (S.1-S.2)