simultaneous equations

2x - 3y = 21 5x + 2y = 5

Answers
To answer these simultaneous questions you have to first check whether the x or y terms have the same number. If the y havent then you must make them the same
javaid.aslam
19 June 2011
If you look at the y terms first. What number can you convert them both into? Or in other words 3 and 2 are factors of which number?
javaid.aslam
19 June 2011
Our new equations are 4x - 6y = 42 and 15x +6y = 15
javaid.aslam
19 June 2011
They are both factors of 6 which means we will need to multiply the first equation by 2 and the second equation by 3
javaid.aslam
19 June 2011
Because the signs are different we must add both equations to get 19x = 57, therefore x = 3
javaid.aslam
19 June 2011
If we subsititute this into one of the other equations y = -5
javaid.aslam
19 June 2011
Add an answer

Similar questions