Matrices and determinant

Algebra Level 1

2x-2y=4

3x+2y=6

x=43, y=99 x=32, y=76 x=2, y=0 x=23, y=34

Abdul Rehman by Abdul Rehman , 21, Pakistan

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2 solutions

Adding the two equations gives

5x = 10

Dividing both sides by 5, gives

x = 2

Substituting x = 2 in any of the two given equations gives y = 0.

The desired answer is x = 2 and y = 0.

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Mihir Kulkarni
Jun 11, 2014

Add both equations will get x=2 substitute value of x in any equation will get y = 0

0 Helpful 0 Interesting 0 Brilliant 0 Confused

Ah, the issue is that in the MCQ options, you didn't write it clearly enough, and it appears as x = 2 y = 0 x = 2y = 0 as opposed to x = 2 , y = 0 x = 2, y = 0 .

I have edited the options for clarity.

Calvin Lin Staff - 7 years ago

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