Answer:
a = 7
Explanation:
We are given that the figure is a parallelogram.
In a parallelogram, each two opposite sides are equal.
This means that:
QT = RS
We are also given that:
QT = 3a + 7 and RS = 4a
Equating the two values, we will be able to solve for "a" as follows:
QT = RS
3a + 7 = 4a
4a - 3a = 7
a = 7
Hope this helps :)
