Question

For a simultaneous equation in x and y, if Dx = 25, Dy = 50 and D = 5, What is the value of x ? (A) -5 (B) 1 5 (C) 10 (D) 5

Answer 1

x=Dx/D = 25/5=5.
your ans is x= 5

Answer 2

The value of x = 5

Given :

For simultaneous equations in x and y

$\sf{D_x = 25 \: , \: D_y = 50 \: , \: D = 5}$

To find :

The value of x is

(A) - 5

(B) 1/5

(C) 10

(D) 5

Solution :

Step 1 of 2 :

Write down the given data

Here it is given that for simultaneous equations in x and y

$\sf{D_x = 25 \: , \: D_y = 50 \: , \: D = 5}$

Step 2 of 2 :

Find the value of x

Using Cramer's rule we get

$\displaystyle \sf{x = \frac{D_x}{D} = \frac{25}{5} = 5 }$

$\displaystyle \sf{y = \frac{D_y}{D} = \frac{ 50}{5} = 10 }$

Hence the correct option is (D) 5

━━━━━━━━━━━━━━━━

Learn more from Brainly :-

1. Solve the given system of equations.

2x + 8y = 5 24x - 4y = -15

https://brainly.in/question/33685046

2. 2x+3y=12 and 4x+5y=22

https://brainly.in/question/18427922