Melaka Trial 2025 Add Maths Paper 1, Question 5Systems of Equations

Solved on video in English · Form 4, Systems of Equations · 5:13 video

The question

Solve the following simultaneous equations: 3r + 3s − 2t = −5 2r − s + 3t = 5 r + 2s = t

Step 1

Use the third equation t = r + 2s to eliminate t from the first two equations.

Why this step

The third equation already has t on one side, so substituting it removes t from the other two equations at once.

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

Final answer

r = −2, s = 3, t = 4

Where students lose marks

Watch out: expand −2(r + 2s) as −2r − 4s, and don't stop at r and s. Substitute back to find t.

Watch every step of this question solved on video (5:13), 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.