Question

What is value of Dx for solving simultaneous equation 3x + 2y = -11 and 7x - 4y = 9 by cramer' rule?​

Answer 1

Given equations are 3x+2y+11=0 and 7x−4y=9

⟹3x+2y=−11 and 7x−4y=9

By Cramer's rule,

D=∣∣∣∣∣∣​37​2−4​∣∣∣∣∣∣​=−12−14=−26

Dx​=∣∣∣∣∣∣​−119​2−4​∣∣∣∣∣∣​=44−18=26

Dy​=∣∣∣∣∣∣​37​−119​∣∣∣∣∣∣​=27+77=104

Now, x=DDx​​=−2626​=−1

y=DDy​​=−26104​=−4

Hence, x=−1,y=−4.

Answer 2

Explanation:

value of Dx for solving simultaneous equation 3x + 2y = -11 and 7x - 4y = 9 by cramer' rule

hloo bhai

kaiche ho??

kha busy rhte ho

on hi noi aate aaj kl.. :(