Solve: x/x+4 + 7/x-2 = 1 (Must show working)[4 marks]
(x(x-2) + 7(x+4) )/ (x+4)(x-2) = 1x(x-2) + 7(x+4) = (x+4)(x-2)x^2 -2x +7x +28 = x^2 -2x +4x -8x^2 +5x +28 = x^2 +2x -83x +36 = 03x = -36x x= -12
AM
Related Maths GCSE answers
All answers ▸There are 10 boys and 20 girls in a class. The mean mark in a test for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys.
5y + 1 = 3y + 13
Solve the simultaneous equations: 3x + y = 15 and 4y + 3 = 9x
By completing the square, find any turning points and intersects with the x and y axes of the following curve. f(x) = 2x^2 - 12x +7