16y < -64?

to solve, y must be on one side of the inequality. to do so, divide 16 on both sides of the equation. what you are left with is y>-4. the inequality switches directions when you divide by any number.

y = -4

y < - 4

16y < -64
y < -64/16
y < -4

y<-64/16 y<-4

-4...?

Divide both sides by 16

y < -4

y < (-64)/16
y < -4