Solve the simultaneous equations 3x - y = 5, x + 2y = -3
3x - y = 5 (A), x + 2y = -3 (B),6x - 2y = 10 (2A) ,7x + 2y +- 2y = 7 (2A) + (B),7x +2y - 2y = 7,7x = 7,x = 1,Sub x=1 -> (A),3(1) - y = 5,3 - y = 5,-y = 2,y = -2,x = 1, x= -2
JC
Related Maths GCSE answers
All answers ▸A ship sets off on a bearing of 072 degrees from port and travels 3.4km in a straight line. How far north of the ship's starting position is its final position? Give your answer to two decimal places.
Solve the simultaneous equation: 3x+y=24, x-7-y=-3
Given that y is directly proportional to square root of x and that y = 20 when x = 49 find an expression to represent x and y.
I struggle with time management whilst doing an exam paper. How will I be able to answer every question in the time given for the exam?