Answer:
x = 41
y = 24
Step-by-step explanation:
Systems of equations is,
-2x - 7y = -250 ------(1)
4x - y = 140 ------(2)
Equation (1) multiplied by 2 then added to equation (2)
 -4x -14y = -500
(+) Â 4x - y = 140 Â
     -15y = -360
       y = [tex]\frac{360}{15}[/tex]
      y = 24
by putting y = 24 in equation (2),
4x - 24 = 140
4x = 140 + 24
x = [tex]\frac{164}{4}[/tex]
x = 41
For x = 41 and y = 24 both the equations are true.
Equation (1), Â -2(41) - 7(24) = -250 Â [True]
Equation (2), Â 4(41) - (24) = 140 Â [True]