Find the value of x from the following: .
We are given with matrix equation,
We need to find the values of x and y.
We know by the property of matrices,
This implies,
a11 = b11, a12 = b12, a21 = b21 and a22 = b22
So, if we have
Corresponding elements of two matrices are equal.
That is,
2x – y = 6 …(i)
5 = 5
3 = 3
y = -2 …(ii)
To solve for x and y, we have equations (i) and (ii).
From equation (ii),
y = -2
Substituting y = -2 in equation (i), we get
2x – y = 6
⇒ 2x – (-2) = 6
⇒ 2x + 2 = 6
⇒ 2x = 6 – 2
⇒ 2x = 4
⇒ x = 2
Thus, we get x = 2 and y = -2.