Respuesta :
Substitute -10 for x in each equation. y values should be the same.
y = 1/2x + 4 =1/2(-10)+4 = -1
y = 4x + 30 = 4(-10) +30 = -10
-1 ≠ -10, so (-10,-1) is not a solution.
y = 1/2x + 4 =1/2(-10)+4 = -1
y = 4x + 30 = 4(-10) +30 = -10
-1 ≠ -10, so (-10,-1) is not a solution.