SPM 2021 Add Maths Paper 2, Question 1Systems of Equations

Solved on video in English and Bahasa Melayu · Form 4, Systems of Equations · 4:01 video

The question

Solve the following simultaneous equations: 4x + y + 2z = 0 , −2x + 3y + z = 8 , x − y − z = −1/2

Step 1

Label the equations: 4x + y + 2z = 0 ... (1); −2x + 3y + z = 8 ... (2); x − y − z = −1/2 ... (3).

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

Final answer

x = 1/2, y = 4, z = −3

Where students lose marks

Watch out: multiply every term, including the right side, and check signs carefully. One algebra slip ruins x, y and z.

Watch every step of this question solved on video (4:01), 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.