y = -2x - 5
y = 4x + 1
This equation has one solution. y = -3 and x = -1.
y=−2x−5
substitute −2x − 5 for y in y = 4x + 1:
y = 4x + 1
−2x − 5 = 4x + 1
−2x − 5 + −4x = 4x + 1 + −4x
−6x − 5 = 1
−6x − 5 + 5 = 1 + 5
−6x = 6
(Divide both sides by -6)
x = −1
substitute −1 for x in y = −2x − 5
y = −2x − 5
y = (−2)(−1) − 5
y = −3