parallelogram diagonal bisection
Check the final answer first, then review the worked steps.
Problem
parallelogram diagonal bisection
Step-by-step solution
In a parallelogram, diagonals bisect each other, so $AE = \frac{1}{2}AC$. Thus, $3x - 7 = \frac{28}{2} = 14$, which gives $3x = 21$ and $x = 7$.
Answer
7