Question

What is the value of D, for solving
simulataneous equation x+y = 3:
3x-2y - 420 by determinant method​

Answer 1

Step-by-step explanation:

x+y=3:3x-2y-420

x+y-3 ..... 1

3x-2y-420....2

let a1= 1 ,b1=1, c1=-3................. 3

let a2=3, b2= -2, c2=-420........... 4

D= a1 b1

a2 b2.................in mode

from 3 and4

= 1 1

3 -2

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

= -2+6

=4

Value of D= 4

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