How can I solve simultaneous equations?

There are many options, but substitution is the one we will go through for this example first. Lets say you have 3x+4y = 10 and x+2y = 6In this case substitution would be easiest because you have a singular 'x' in one of the equations. Make x the subject of the second equations so that x = 6 - 2y, and then substitute this into the first equation 3(6 - 2y) + 4y = 10 to give you 18 - 2y = 10. From here simplify to find y: 8 = 2y therefore y = 4. then find x; x = 6 - 2y. x = 6 - 8 therefore x = -2.

TD
Answered by Tanika D. Maths tutor

2540 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How many centimeters are there in 6.8 meters?


A line joins 2 points (2,9) and (5,4). Calculate the gradient of the straight line and then write down the equation of the straight line.


Solving quadratic equations using the factorisation method.


The line L1 has an equation y=2x-2. What is the equation of the line L2 which is parallel to L1 and passes through the point (0,3)?


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