Trusted since 2008
Chat on WhatsApp
   Get premium membership and access questions with answers, video lessons as well as revision papers.

Karani bought 4 pencils and 6 biro pens for sh. 66 and Tachora bought 2 pencils and 5 biro pens for sh. 51

Class: Form 1

Subject: Mathematics

Topic: Linear Equations

Lesson Summary

Karani bought 4 pencils and 6 biro pens for sh. 66 and Tachora bought 2 pencils and 5 biro pens for sh. 51

a) Find the price of each item.
b) Musoma spent sh. 228 to buy the same type of pencils and biro pens. If the number of biro pens he bought were 4 more than the number of pencils, find the number of pencils he bought.



Text Answer


a) Let the cost of biro pen be b
Let the price of a pencil be p
4š‘+6š‘=66……..(1)
2š‘+5š‘=51………(2)
By elimination method
Multiply (2) by 2 to eliminate p
4š‘+6š‘=66
2(2š‘+5š‘=51)
4š‘+6š‘=66
-4š‘+10š‘=102
-4p-4=-36-4
š‘=š‘ ā„Ž.9

Substitute b = 9 in (2)
2(š‘)+5(9)=51
2š‘+45=51
2š‘=51āˆ’45
2p2=62
p=3

B= sh.9 p = sh.3



b)
B=x + 4
P = x
9(x + 4) + 3x = 228
9x + 36 + 3x = 228
12x = 228 – 36
12x = 192
12x12=19212
X = 16

Next: Simplify the following expression
Previous: In January, Mambo donated 16th of his salary to a children’s home while Simba donated

View all Form 1 Mathematics Video Lessons | View All Lessons

More Video Lessons


View all video lessons  
Kenyaplex Learning