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
1 answer:
Answer:
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
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