What is the perimeter of rhombus LMNO?
A.20 units
B.24 units
C.40 units
D.48 units

If you see that 3x-3 and set it equal to x+7 then you will get this,
3x-3=x+7
Now solve for X. You will get 5.
Then you plug five in and get 12 For both sides and then multiply 12 by 4 and get 48.
You answer is 48.
Hope this helps you.