Answer:
The answer is x = -7.
Step-by-step explanation:
In order to find this, we need to start by using the slope formula with all of the information that we have.
m(slope) = (y2 - y1)/(x2 - x1)
1 = (3 - -7)/(3 - x)
1 = 10/(3 - x)
Now we can use cross multiplication to solve for x.
1(3 -x) = 1(10)
3 - x = 10
-x = 7
x = -7
