SPM 2023 Add Maths Paper 2, Question 1Systems of Equations

Solved on video in English and Bahasa Melayu · Form 4, Systems of Equations · 5:10 video

The question

Solve the following simultaneous equations: 2p − q − r = 6, p + 2q − 4r = 8, 3p + q − r = 2

Step 1

Label the equations: 2p − q − r = 6 ... (1); p + 2q − 4r = 8 ... (2); 3p + q − r = 2 ... (3).

8 more steps, each with the reason for it, in the full solution

Final answer

p = 2/5, q = −11/5, r = −3

Where students lose marks

Watch out: when subtracting, put the whole equation in brackets and flip every sign; sign slips cause wrong answers like q = −13/5.

Watch every step of this question solved on video (5:10), with the reason behind each step and a box that checks your own answer.

No card. Every past-year question on video, in English and BM.