Question

5x + 4y. and x - 12y = 20. find x and y by substituting method​

Answer 1

Answer:

x = 5

y = -5/4

Step-by-step explanation:

5x + 4y = 20

x - 12 y = 20

comparing both

5x + 4y = x -12y

=> 4x = -16y

=> x = -4y

now substituting value of x in

x - 12y = 20

-4y -12y = 20

=> -16y = 20

=> -4y = 5

=> 4y = -5

=> y = - 5/4

x = -4y = 5