Question

what is the value of DX for the simultaneous equation 3x+2y+11=0 & 7x-4y=9​

Answer 1

Step-by-step explanation:

on multiplying first equation by 7 we get

21x+14y= -77----------------(1)

on multiplying first equation by 3 we get

21x-12y=27-------------(2)

on subtracting (2) from (1) we get

26y= -104

y= -4

now put the value of y in 1st equation

21x= -21

x= -1