DKLM is a rhombus.

If AM = 4x, AK = 5x-3, and DL = 10, find x.

I assume A is the intersection of the diagonals.

Since the diagonals bisect each other,
4x = 5x-3
x = 3

If I guessed wrong on A, provide more info.

X=10

To find the value of x, we need to use the given information about the rhombus DKLM.

In a rhombus, the opposite sides are congruent, so we can set up an equation using the lengths of AM and DL.

AM = AK + KM
4x = 5x - 3 + KM

Now let's gather additional information to simplify the equation. We know that DL = 10, but since DKLM is a rhombus, all its sides are congruent. So, KM = DL.

Substituting the values, we get:
4x = 5x - 3 + 10

Simplifying the equation:
4x - 5x = 7
-x = 7

To find x, we need to solve for x by dividing both sides of the equation by -1.
x = -7

Therefore, the value of x is -7.