What is the missing expression that would make the left-hand-side of the equation equal to the right-hand-side?

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).

last one.

step-by-step explanation:

last one.

generally speaking, the others follow some sort of pattern that correlates to either linear (looks like a straight line) or sinusoidal (looks like an s).

the last one is just a random cloud of points that doesn't correlate to any particular known order.