The number of girls enrolled in a school last year was g. The number of girls enrolled this year in the school is 3g – 10.

Price of petrol was Rs p per litre last month. Price of petrol now is Rs (p – 5) per litre.

Khader’s monthly salary was Rs P in the year 2005. His salary in

2006 was Rs (P + 1000).

Translate each of the following statements into an equation, using x as the variable:

(a) 13 subtracted from twice a number gives 3.

(b) One fifth of a number is 5 less than that number.

(c) Two-third of number is 12.

(d) 9 added to twice a number gives 13.

(e) 1 subtracted from one-third of a number gives 1.

Translate each of the following statements into an equation:

A. The perimeter (p) of an equilateral triangle is three times of its side(a).

B. The diameter (d) of a circle is twice its radius (r).

C. The selling price (s) of an item is equal to the sum of the cost price (c) of an item and the profit (p) earned.

D. Amount (a) is equal to the sum of principal (p) and interest (i).