Answer:
Step-by-step explanation:
Given
Required
Determine the coordinates of A
Midpoint is calculated as thus:
Substitute the given values
Multiply through by 2
By comparison:
Hence:
60 + 3x + x + 20 = 180
4x = 180 - 20 - 60 = 100
x = 25
________
60
x + 20 = 45
3x = 75
I think it is ADE