Question

3.
- 4x + y = 6
- 5x - y = 21

Answer 1

Explanation:

-4x+y=6

-5x-y=21

y=6+4x

-5x-(6+4x)=21

-5x-6-4x=21

-5x-4x=21+6

-9x=27

-9x÷9=27÷9

x=3

y=6+4x

=6+4(3)

=18

Answer 2

(-3,-6)

Explanation:

You need to solve for the system of equations.