Question

10) Find the value of Dx for the equation
4x - 3y= 19 and 4x-3y=-1 a)24 b)0 c)-24 d)108​

Answer 1

Step-by-step explanation:

I hope it will be helpful

Answer 2

SOLUTION

TO CHOOSE THE CORRECT OPTION

Find the value of

$\sf{D_x }$

for the equation

4x + 3y = 19 and 4x - 3y = - 1

a) 24

b) 0

c) - 24

d) 108

EVALUATION

Here the given system of equations are

4x + 3y = 19 - - - - - - (1)

4x - 3y = - 1 - - - - - - (2)

Therefore

$\displaystyle \sf{D = \begin{vmatrix} 4 & 3 \\ 4 & - 3 \end{vmatrix} = - 12 - 12 = - 24 }$

$\displaystyle \sf{D_x = \begin{vmatrix} 19 & 3 \\ - 11 & - 3 \end{vmatrix} = - 57 + 33 = - 24 }$

FINAL ANSWER

Hence the correct option is c) - 24