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Given:
The equation is

To find:
The missing value.
Solution:
Let the missing value be k.


Using the formulae
and
.


Cancel out the common factors from both sides.

Multiply both sides by (x+1).

Therefore, the missing value is 5(x+1).
This is an inequality.
This is what the statement should look like: 
Now, you can actually "properly" reverse these meaning the equality sign changes too. So basically you can mirror them.
The "mirrored" inequality expression would look like this: 
Now just like normal algebra, you can transpose these terms from 1 side to another and so, -8 would transpose to the right hand side and the operation would be the inverse or in this case, addition. The expression would look something like this: 
Add them up and you get:
:D
340 × .2 = 68
68 page decrease
340 - 68 = 272
272 pages left
Answer:
366cm²
Step-by-step explanation: