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.

Answered by Eddie B. Maths tutor

2690 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Washing powder is sold in two sizes: Bag 1 is 600 grams for £3.30. Bag 2 is 1500 grams and usually costs £9.60 but currently has 15% off. Which is better value?


Plot the graph for y = 4x - 3


Simplify fully (3x^2-8x-3)/(2x^2-6x)


Expand and simplify the following equation: 6(x-3) - 4(x-5) = 0


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences