1: x = 2, 2: y = x + 5 -> Solve this pair of simultaneous equations.

A set of simultaneous equations most commonly represents two lines on a graph, or perhaps a circle, with a line running through it. When you solve a set of simultaneous equations, its important to remember that what you are actually doing is finding the coordinates on the graph, in the case of two straight lines, where the two lines cross. There are two methods of solving simultaneous equations; by elimination or substitution. In the case above, only one of the equations (equation 2) contains an x, and a y, meaning there's no need to use elimination. Substituting equation 1 into equation 2 will leave us with the following: -> 1: x = 2, y = x + 5 - > Substitute 1 into 2: -> y = 2 + 5 = 7 -> Ans: x = 2, y = 7. This is a very basic example but aims to start helping one to spot when to use elimination, or substitution when solving simultaneous equations.

EB
Answered by Eddie B. Maths tutor

2910 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

multiply out (2x-4)(x-2) and simplify.


What is 25% of 400?


The equation of the line L1 is y = 3x – 2 The equation of the line L2 is 3y – 9x + 5 = 0 Show that these two lines are parallel


A group of 55 pupils were asked if they owned a phone or a tablet.11 people are known to own both18 said they only owned a tablet34 said they owned at least a phoneA student is picked a random, what is the probability that the student doesn’t have a phone


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