Question

5x-y=-4;7x-2y=4
solve the sum by substitution method​

Answer 1

Answer:

(-4,-16)

Step-by-step explanation:

5x-y=-4.

5x+4=y. ---(1)

7x-2y=4 ----(2)

substituting equation 1 in equation 2

7x-2y=4

7x-2(5x+4) = 4

7x-10x-8=4

-3x-8=4

-3x=4+8

-3x=12

x=12/-3

x=-4

substituting X=-4 in in equation 1

5x+4=y

5(-4)+4=y

-20+4=y

y=-16

so the values of x and y is (-4,-16)

hope this will help you