Asked by sherine
using determinant method, what is the value of x in the equations 3x + 2y = "-10" and 5x + 3y = "-16?"
Answers
Answered by
oobleck
why the quotation marks? They don;t clarify or change anything.
Anyway, you have
D =
|3 2|
|5 3| = -1
Dx =
|-10 2|
|-16 3| = 2
Dy =
|3 -10|
|5 -16| = 2
x = Dx/D = -2
y = Dy/D = -2
as always, check to make sure these values work in the original equations.
They do.
Anyway, you have
D =
|3 2|
|5 3| = -1
Dx =
|-10 2|
|-16 3| = 2
Dy =
|3 -10|
|5 -16| = 2
x = Dx/D = -2
y = Dy/D = -2
as always, check to make sure these values work in the original equations.
They do.
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