Question

Help on this please.

Answer 1

Answer:

x=25

Step-by-step explanation:

This is a parallelogram, so we know the angle opposite of a certain angle is the same. (i.e. Angle D=Angle B). Since we know what angle D, A, C, and B add to 180, we can add them to get (5x+15+2x-10)*2=360, which simplifies to 14x+10=360. If we subtract 10 from both sides, we get 14x=350. Solving for x is easy from here. We simply do 350/14 and get 25. Hopefully this explanation helps!