Question

solve by MATRIX METHOD x+2y=3 ,2x-y=1​

Answer 1

Answer:

x + 2y = 3 .. (1)

2x - y = 1...(2)

by multiplying 2 equation by 2.

2 ( 2x - y) = (1) 2

4x - 2y = 2..( 3)

let's add first and third equation.

x + 2y + 4x - 2y = 3 + 1

5x = 4

x = 4/5

put the value of x in 1st equation.

x + 2y = 1

4/5 + 2y = 1

2y = 5/4

y= 5/4 * 1/2 = 5/8