MRSM Trial 2025 Add Maths Paper 2, Question 1Systems of Equations

Solved on video in English · Form 4, Systems of Equations · 4:38 video

The question

Solve the following simultaneous equations: x − y = 7 xy = 120

Step 1

Make one variable the subject of the linear equation: from x − y = 7, write x = 7 + y (equivalently y = x − 7).

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

Final answer

x = 15, y = 8 or x = −8, y = −15

Where students lose marks

Watch out: keep +7y (not −7y) when rearranging, and pair each x with its own y using x = 7 + y.

Watch every step of this question solved on video (4:38), 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.