Note: Answers to all questions are given at the end of this exercise. Question No. 1: In each of the following, let x denote the unknown. Derive an equation involving x: (a) when a certain number is increased by 7, the result is 18. (b) when a number is increased by 2 and the result multiplied by 3, the ...

## Exercise No. 7F

Note: Answers to all questions are given at the end of this exercise. Question No. 1: How many grams are there in 5kg? How many grams are there in x kg? Note: Answers to all questions are given at the end of this exercise. Question No. 2: What is the cost of 6 magazines at $4 each? What is the ...

## Exercise No. 7E

Note: Answers to all questions are given at the end of this exercise. Question No. 1: Using the letter suggested, construct a simple formula in each case: (a) the sum (S) of three numbers a, b and c. (b) the product (P) of two numbers x and y. (c) the difference (D) between the ages of two boys; one being ...

## Exercise No. 7D

Note: Answers to all questions are given at the end of this exercise. Take the value of π as 3 1/7 where necessary. Question No. 1: If V=1/3 Ah find V when A=43, and h=6 Note: Answers to all questions are given at the end of this exercise. Question No. 2: If F=9C/5 + 32 find F when c=30. Note: Answers to ...