Question

11x-6y= -18,5x-4y= -40 by substitution

Answer 1

Answer:

x=12, y=25

Step-by-step explanation:

11x-6y= -18---------------(equation_1)

5x-4y= -40---------------(equation_2)

from equation 1,

11x-6y= -18

or, 11x= -18+6y

or, x=(-18+6y)/11

putting the value of x in equation_2,

5{(-18+6y)/11}-4y= -40

(-90+30y)/11-4y= -40

-90+30y-44y= -40*11

-90-14y= -440

-14y= -350

y= -350/-14

y= 25

putting the value of y in equation1,

11x-6*(25)= -18

11x= -18+150

x= 132/11

x= 12

Answer 2

Answer:

11x-6y=-18, 5x-4y=-40

x=12 and y=25