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

2400 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve the Simultaneous Equations -3X + 4Y=11 & X-2Y = -5 to find the values of X and Y


Expand and simplify (6x + 10)(3x - 2)


How do you factorise and know if it is a difference of two squares ?


Find the solutions to this quadratic equation: 0 = 2x^2 - 5x - 3


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