Solve the simultaneous equations 1) 3x + 2y = 4 & 2) 4x + 5y = 17

Find the lowest common denominator of either x or y. x in this example. ( 12x )Multiply both equations such that the x's match this. ( 1) 12x + 8y = 16 & 2) 12x + 15y = 51 )Combine these formulas by taking one from the other. ( 7y = 35 )Solve for y. ( y = 5 )Put y back in to find x. ( x = -2 )Put both x and y in to confirm ( (4*-2) + (5*5) = 17 )

RT
Answered by Robert T. Maths tutor

2699 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Andrew buys a Laptop for £600 which includes 20% VAT. What is the price of the Laptop without VAT?


Express 300 as a product of its prime factors.


Solve these simultaneous equations: 2x + 3y = 19 and x + 4y = 17.


Given the points (6,6) and (10,8) calculate the gradient of the line passing through them and the point at which it intersects the y-axis?


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:

© 2026 by IXL Learning