Solve the following simultaneous equation for x and y: 2x + 5y = 8, 4x + y = 7

Equation A: 2x + 5y = 8

Equation B: 4x + y = 7

2A: 4x + 10y = 16

2A - B: 9y = 9, Therefore y = 1

Sub y back into equation A to find x:  2x + 5 = 8,  2x = 3,  x = 1.5

ND
Answered by Nicholas D. Maths tutor

5532 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5 Work out the area of the triangle.


How can I tell if two lines are perpendicular from the equations?


What is 3/5 of 65.


Use these 2 simultaneous equations to find x & y: 5y+21=9x and 6x+7y=45


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