# How do you solve and check your solution given y+7.2=21.9?

Apr 28, 2017

$y = 14.7$

#### Explanation:

$y + 7.2 = 21.9$

We have to subtract 7.2 from both sides to isolate $y$.

Thus, $y = 14.7$

To check the solution, substitute $14.7$ for $y$.

$14.7 + 7.2 = 21.9$
$21.9 = 21.9$

Because $21.9$ is equal to $21.9$, $y$ is equal to $14.7$