Given that x : y = 7 : 4 and x + y = 88, calculate x - y.

From x : y = 7 : 4 work out an expression for x: x = y (7/4) and substitute into x + y = 88: y(7/4 + 1) = 88y( 11/4) = 88 y = 88 (4/11) = 8 x 4 = 24substitute this into x + y = 88 to get x = 88 - 24 = 64.
x - y = 64 - 24 = 40.

TD
Answered by Tutor157746 D. Maths tutor

3344 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

The normal price of the pair of shoes is £28. In a sale the price is reduced by 35%. What is the new price of the shoes?


Julia wants to buy a new computer. 20% VAT is added to the price of the computer so that she now has to pay £300. What was the original price of the computer without VAT.


A fair sided spinner has five equal sections numbered 1 to 5, a fair six sided dice has five red faces and one green face. what is the probability of getting an even number and the colour green


A right-angled triangle has side lengths of 8.65cm and 10.15cm. What is the length of its hypotenuse?


We're here to help

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

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning