6x + 2y = 22, 2x + y = 8. Find x and y.
Times second equation by 2.6x + 2y = 22 4x + 2y = 16Cancel the y's to gain equation of just x's. 6x + 2y =22 4x + 2y = 16 - ------------------- 2x = 6 ; x = 3Substitute x into an equation.(2×3) + y = 8y = 8-6y=2
JO
Related Maths GCSE answers
All answers ▸A cylinder of base radius 2x and height 3x has the same volume as a cone of base radius 3x and height h. Find h in terms of x.
A bag with 750 balls is comprised of 300 red, 200 blue and 250 green. What is the probability of three green balls being in succession, providing the ball is put back between each turn.
The equation of line 1 is: 3y-5x+3=0. The equation of line 2 is : y= 5x/3+9. Check whether the 2 lines intercept.
A ball of mass m is thrown with velocity of (7i + 4j) m/s from a height of 1m. After some time it hits the ground. Find the: a) ball's maximum height b) speed it hits the ground c) distance travelled