Matrix algebra help??? please? ?

Question

can someone tell me how to solve this?

4 9 times x 2

3 5 y = 5

this is one problem.

Answer 1

The determinant of matrix

(4 9)

(3 5)

is -7

so it's inverse is therefore

(-1/7)*

(5 -9)

(-3 4)

Multiplying this to both sides gives

(x) = (-1/7)*(5 -9)(2)

(y).............(-3 4)(5)

=>

(x) = (5)

(y)....(-2)