Math, asked by karanrathod2639, 4 months ago

please give urgent

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Answered by leninviki

0

Answer:

3

Step-by-step explanation:

determinant is 31

a11×a22-a12×a21=31

7x+10=31

x=3

Answered by jayanid78

1

Answer:

7

Step-by-step explanation:

cross multiply x*7 and -5*2

=7x-(-10)=31

= 7x+10=31

7x=31-10

7x=21

x=7

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