Bob buys 33 pens and 21 rulers for £6. A ruler costs 8 pence more than a pen. How much does one pen cost?

Let the cost of a pen = xLet the cost of a ruler = x+8Thus, (x*33) + ((x+8)*21) = £6 = 600 penceHence, 33x + 21x + 168 = 600 54x = 432 x = 8Therefore one pen costs 8 pence.

GL
Answered by George L. Maths tutor

1879 Views

See similar Maths KS3 tutors

Related Maths KS3 answers

All answers ▸

Differentiate sin(2x)


A triangle has the following dimensions: 5 km, 12 km and 13 m. Is it a right triangle?


Simplify \sqrt{98} - \sqrt{32} giving your answer in the form k*sqrt{2} where k is an integer


You have 2 fair dice with 6 sides and you roll them both, what's the probability that the sum of rolled numbers will be 11?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences