Question

by equating coefficients of variables, solve the following equation. x - y = -7 ; 3x - 4y = -12​

Answer 1

Answer:

by raj

Step-by-step explanation:

solve =x3-4y

=1xy+7

=7-12

=19xy

Answer 2

Answer:

The value of x = -10 and y = -3

Step-by-step explanation:

x - y = -7

x = -7 + y -----------------------(1)

3x - 4y = -12

(substituting the value of x from equation (1) )

3 ( -7 + y ) - 4y = -12

-21 + y -4y = -12

-21 - 3y = -12

-21 + 12 = 3y

-9 = 3y

-9/3 = y

-3 = y

so, substituting the value of y = -3 in equation (1), we get

x = -7 + y

x = -7 + (-3)

x = -7 - 3

x = -10

Therefore, the value of x = -10 and y = -3

Hope it's helpful for you :)