Question

Use substitution to solve the linear system of equations

x = 4.
-y = 1/2x

(4, -2)

(-2, 4)

(4, 2)

(2, -4)

Answer 1

I think it is (4,-2)

Answer 2

solution = (4, - 2 )

substitute x = 4 into - y =
`(1)/(2)` x

- y =
`(1)/(2)` × 4 = 2 ( multiply both sides by - 1 )

y = - 2

solution is ( 4, - 2 )