Respuesta :
4x + 4y = 20
4x + 4x - 4x = 20 - 4x
4y = 20 - 4x
4y / 4 = (20 / 4) + (- 4x / 4)
y = 5 - x
y = - x + 5 (the correct answer is c)
4x + 4x - 4x = 20 - 4x
4y = 20 - 4x
4y / 4 = (20 / 4) + (- 4x / 4)
y = 5 - x
y = - x + 5 (the correct answer is c)