Use substitution to solve the linear system of equations x = 4. -y = 1/2x (4, -2) (-2, 4) (4, 2) (2, -4)

solution = (4, - 2 )

substitute x = 4 into - y = x

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

y = - 2

solution is ( 4, - 2 )

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1/4 = .25 / 25%