How do you solve and check your solution given -0.4y=2?

1 Answer
Oct 2, 2017

y=-5

Explanation:

We know that -0.4y=2
We multiply both sides by 10:

-0.4ycolor(blue)*color(blue)10=2color(blue)*color(blue)10
Simplify:
-4y=20
Divide both sides by -4

(-4y)/(-4)=20/(-4)
Simplify:
y=-5

Let's check.

y=-5

-0.4y=2

-0.4*y=2

-0.4*-5=2

The equation is true.
So, the answer is y=-5.