Evaluate Dx. x + 2y = 3 3y - x = 2

Evaluate Dx.

 

                                                   

                                                               x + 2y = 3 3y - x = 2
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2 Answers

by Level 10 User (57.4k points)
Add the two equations: 5y=5 so y=1, therefore x=3-2y=1.

What did you mean by Dx? If it's the determinant for x then it's:

| 3 2 |

| 2 3 | = 9-4=5

Dy is:

| 1 3 |

| -1 2 | = 2-(-3)=5

And D is:

| 1 2 |

| -1 3 | = 3-(-2)=5

x=Dx/D=5/5=1 and y=Dy/D=5/5=1
by Top Rated User (1.2m points)

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