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 ▸

How do you find the maximum and minimum value of a quadratic function with no use of calculus?


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.


A linear sequence starts a + 2b, a +6b, a + 10b. The 2nd has a value of 8 and the 5th term has a value of 44. What are the values of a and b?


Solve the simultaneous equation: 2x + y = 18, x - y = 6