Page 2 - Equations, substitution formulae
P. 2
Equations involving word problems.
a. One packet of sweets cost R 6. How many packets would be bought for R42?
b. The area of a vegetable garden is 200 ² and has a length of 40 . What is its width?
c. Seven equal iron ball which are kg each were weighed and had a total mass of 35 .
Determine the
value of .
Solutions
a. One packet of sweets cost R 6. How many packets would be bought for R42?
Let the number of packets bought be
6 = 42
6
42
=
6 6
= 7
b. The area of a vegetable garden is 200 ² and has a length of 40 . What is its width?
= ×
200 = 40 w
200 40
=
20 40
10 =
ℎ = 10 
