DEF is a scalene triangle
What is the question supposed to be?
850.
68,750 = 350(75) + 50x
68, 750 = 26,250 + 50x
-26250
42,500 = 50x / 50
850 = x
You can make use of the slope-intercept form of a line which is:
y = mx + b
Substitute m and the coordinates of a point in the line to find b,
-2 = (2/5) (5) + b
b = -4
The equation is
y = (2/5) x - 4
In standard form:
(2/5)x - y = 4
2x - 5y = 4