How can a system of two linear equations be solved?

There are, mainly, three ways of doing it easily:
Substitution: It consists in modifying one of the equations in such a way that x is expressed in terms of y  (or y in terms of x) and then substitute that expression in the other equation. Elimination: it consists in multiplying on of the equations by a number such that when we add both equations x or y disappear, getting one equation with one variable easy to solve. Then, we substitute that solution into one of the equations. Graphically: it consists in drawing both lines, each one represented by one equation, and find out the point that have in common.

Related Further Mathematics GCSE answers

All answers ▸

The line y = 3x-4 intersects the curve y = x^2 - a, where a is an unknown constant number. Find all possible values of a.


f'(x) = 3x^2 - 5cos(3x) + 90. Find f(x) and f''(x).


Make y the subject of the formula x = SQRT((y+1)/(y-2))


How would I solve the following equation d^2x/dt^2 + 5dx/dt + 6x = 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