Find the values of X and Y from the simultaneous equations: 1) 2x + 5y = 33 2) x + 3y = 19

  1. 2x + 5y = 33 2) x + 3y = 19
    multiply equation 2 by a factor of 2 giving you 2x + 6y = 38 Your two equation are now: 1) 2x + 5y = 33 3) 2x + 6y = 38
    Subtract 3 from 1 to eliminate the x's Giving you Y = 5
    Now, as you know Y = 5 replace Y in either of the original equations to get your vaule for X. Here we will choose equation 2
    If Y = 5
    X + 3(5) = 19X = 19 - 15 X = 4
CC

Related Maths GCSE answers

All answers ▸

Prove that the sum of four consecutive whole numbers will always be even.


y is proportional to x^2. When y=45, x=3. Find a formula for y in terms of x.


Given 2 points, how do you calculate the equation of a straight line?


By factorising, solve the quadratic equation x^2-8x+15=0