2.10.4 Matrices, SPM Paper 2 (Long Question)

Question 10:
It is given that matrix M is a 2 × 2 matrix such that
(a) Find matrix M.
(b)   Write the following simultaneous linear equations as matrix equations:
–2x + y = 10
x + 3= 9
Hence, using matrix method, calculate the value of x and of y. [6 marks]

Solution:
(a)

(b)