Question

What is the solution to the system of equations?

y = 1.5x – 4

y = –x

(–1.6, 1.6)
(–1.5, 1.5)
(1.5, –1.5)
(1.6, –1.6)

Answer 1

Set 1.5x − 4 equal to −x:
−x = 1.5x − 4 → −2.5x = −4 → x = 1.6.
Then y = −x = −1.6.
Solution: (1.6, −1.6).