Question

solve the following simultaneous equation in full method​

Answer 1

Answer:

( D )  7 is the correct answer

( See explanation  )

Step-by-step explanation:

3x - 2y = 6  ( 1 )

2x + y = 11   ( 2 )

Comparing equation ( 1 ) with a₁x + b₁y = c₁  we get ,

a₁ = 3           b₁ = -2         c₁ = 6

Comparing equation ( 2 ) with a₂x + b₂y = c₂  we get ,

a₂ = 2       b₂ = 1       c₂ = 11

Now ,

D =  [a₁  b₁    

       a₂  b₂]  

= [3   -2

   2    1]                   (Cross multiply 3 with 1 and 2 with -2  and  b₁a₂ from a₁b₂)

= ( 3 x 1 ) - ( 2 x -2 )

=  3 - ( -4 )

= 3 + 4

=  7

The value of D is 7

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Answer 2

Answer:

( D ) 7 is the correct answer

Step-by-step explanation:

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