Answer:
[tex]a=1[/tex]
Step-by-step explanation:
A parallelogram is a quadrilateral with two pairs of parallel sides. Opposite sides of a parallelogram are equal.
Therefore, set any two opposite sides equal to each other to solve for [tex]a[/tex]:
[tex]a+3=2a+2,\\\\3=a+2,\\a=\boxed{1}[/tex]
