Question

http://media.education2020.com/evresources/2091966_9841533e-5417-4f31-b094-13d645ce5fac.png

Find DM.

A.6
B.7.5
C.9
D.12

Answer 1

12 = 2x-4 because it tells you those two sides are equal.
So x = 8.

Now just plug 8 into 3x/4 because MP and DM are equal too.
3(8)/4 = 6.

Answer is A

Answer 2

thank you, you are very helpful i understand how to do it now.