Hi there!
How are you?
Answer:
[tex]\boxed{y = - x - 7}[/tex]
Step-by-step explanation:
⇒ First add 3x to both sides.
[tex]-3x - 3y + 3x = 21 + 3x[/tex]
[tex]-3y = 3x + 21[/tex]
⇒ Second divide both sides by -3.
[tex]\frac{-3y}{-3} = \frac{3x + 21}{-3}[/tex]
[tex]y = - x - 7[/tex]
Have good day/night!
