Solve the simultaneous equations, x+y = 16, 5x -2y = 17
Multiply the first equation by 2 to obtain 2x+2y = 32,Then use the elimination technique and add the first equation into the second equation to get : 7x = 49 therefore divide by 7 to find x = 7 Sub this value of x into the first equation and rearrange to find y = 9
MO
Related Maths GCSE answers
All answers ▸Expand and simplify (x-3)(3x+5)
Change of subject question. Make 'a' the subject of the formula v = u + at.
Make x the subject of the following equation: 2x-4=2y.
There are 5 red balls and 7 green balls in a bag. A ball is taken from the bag at random and not replaced. Then a second ball is taken from the bag. What is the probability that the 2 balls are the same colour?