Question

$x + y = 4 \\ 2x - y = 5 \: the \: equation \: is \: in \: the \: form \: a \: matix$
​

Answer 1

Step-by-step explanation:

given:

x+y=4. (1)

2x-y=5. (2)

from equation 1. x=4-y

putting this value in equation 2

2(4-y)-y=5

8-2y-y=5

8-3y=5

-3y=5-8. (by transposition)

-3y=-3

y=-3/-3

y=1

by putting y's value in equation 1

x+y=4

x+1=4

x=4-1

x=3

therefore x=3 and y=1