Use the figure to the right to find the value of PT. T is the midpoint of PQ. PT = 3x + 7 and TQ = 7x-9
PT =
(Simplify your answer.) )

x = -1

y = -3

Step-by-step explanation:

We have two equations:

x + y = −4 (1)

y = 2 * x - 1 (2)

What we will do is substitute (2) in (1) and we are left;

 x + 2 * x - 1 = −4

3 * x = -4 + 1

3 * x = -3

x = -3/3

x = -1

Now, to find out and, I replace in (2), like so:

y = 2 * (- 1) - 1

y = -2 -1 =

y = -3

Therefore, the values are:

x = -1

y = -3