Find the value of 5x - 3y when x = -2 and y = -4

This question is all to do with substitution. First, rewrite the question but in instead of writing x and y, put brackets. It will look like this: 5( ) -3( ) Now inside the brackets where x and y would go write the value for the x and the y. It will look like this: 5( -2 ) -3( -4 ) Now multiply out the brackets to get -10+12    which equals 2.

TD
Answered by Tutor83237 D. Maths tutor

12839 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Find the point of intersection between two lines y=2x+4 and 2y+3x=1:


What is the photoelectric effect? (A-Level Physics)


A four sided pyramid, with a vertical height of 10cm and the base 4cmx4cm is placed on the top of a cylinder with radius 1.5cm and a height of 15cm. What is the exposed surface area?


Determine the coordinates of the intersection point(s) between the line y = x^2 + 4x - 8 and y = - 2x - 17


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