Use the echelon method to solve the following system of two equations in two unknowns. check your answer. x+y=17 amd 9x-y=73

  y = 8

x = 9

Step-by-step explanation:

given equation,

x + y = 17     ........(1)

9 x - y = 73...........(2)

writing in matrix form

A X = B

using augamented matrix A|B

using row transformation

R₂ = R₂ - 9 R₁

now,

now

-10 y = -80

    y = 8

and

x + y = 17

x = 17 -8

x =9

step-by-step explanation: