Angles of a Parallelogram.
The correct answer is 55
The consecutive angles of a parallelogram are supplementary, that is, sum up to 180 degrees)
[tex]\begin{gathered} 2x+15\text{ + x = 180} \\ \text{Collecting like terms, we get} \\ 2x+x=180-15 \\ 3x=165 \\ \text{Divide both sides by 3, we get} \\ x\text{ =}\frac{165}{3}=55 \end{gathered}[/tex]The correct answer is 55.
