If shapes are congruent, then they are mathematically equal (same dimensions, angles etc.). So just locate where the angle x is on both triangles, it should have a value on or a calculable value on the other. If you provide us with the actual sheet I could walk you through it.
Answer:
733.05
Step-by-step explanation:
We'll do the distribute property for both.
1/2x6x=3x
1/2x-10= -5
SO....
3x-5+ -4x +30
Which is
-x + 25 or 25-x.
Hope this helps!