Respuesta :
2x - 0.5y = 130
-2(x + y = 120)
2x - 0.5y = 130
-2x -2y = -240
-2.5y = -110
y = -110/-2.5
y =44
x + y = 120
x + 44 = 120
x = 120 - 44
x = 76
-2(x + y = 120)
2x - 0.5y = 130
-2x -2y = -240
-2.5y = -110
y = -110/-2.5
y =44
x + y = 120
x + 44 = 120
x = 120 - 44
x = 76