Yes it is possible. We could draw a trapezoid that has 2 right angles as shown below. A trapezoid has only one pair of parallel sides. A parallelogram needs both pairs of opposite sides to be parallel.
1. Distribute the 4 with (2x-5) 2. Then add 15 to -20 3. Isolate x by adding 5 to the other side of the equal sign 4. Finally divide by 8 on both sides