Answer:
<em>The number that goes in the box is 268</em>
Step-by-step explanation:
<u>Equations</u>
We are given an incomplete identity:
___ + 308 - 126 = 450
And it's required to fill the space with the number that makes the identity true.
Let's fill the space with a variable x:
x + 308 - 126 = 450
Solving for x implies doing inverse operations as shown on the left side.
We must add 126 and subtract 308:
x = 450 + 126 - 308
x = 268
The number that goes in the box is 268
