Solve the simultaneous equations, 8x + 4y = 4 and 6x - 18y = 16

8x + 4y = 4,4y = 18 - 8x,2y = 2 - 4x,18y = 18 - 36x,6x - 18y = 16,18y = 6x - 16,6x - 16 = 18 - 36x,42x = 34,x = 34/42 = 17/21,18y = 90 - 36(17/21),18y = 426/7,y = 71/21

DG

Related Maths GCSE answers

All answers ▸

Write x² + 4x -16 = 0 in the form (x+a)² - b = 0. Solve the equation giving your answer in surd form as simply as possible.


3kg of oranges cost £54. 5kg of apples cost £60. Nina buys 2kg of oranges and 7kg of apples. How much does Nina Pay


Solve n^2 – n – 90 = 0 to find value of n


How do I plot a line on a graph, given the equation y=2x+1 ?