Using the square of the distance formula
(a-7)^2 + ( b - 1)^2 = (a -2)^2 + (b - 0)^2
a^2 - 14a + 49 + b^2 - 2b + 1 =a^2 - 4a + 4 + b^2
-14a -2b + 50 = -4a + 4
-10a + 46 = 2b
b = 23 - 5a
Again
(a - 3)^2 + (b - 5)^2 = (a - 2)^2 + (b - 0)^2 {sub in 23 - 5a for b }
a^2 - 6a + 9 + ( 18 - 5a)^2 = ( a - 2)^2 + (23 - 5a)^2
a^2 - 6a + 9 + 324 - 180a + 25a^2 = a^2 - 4a + 4 +25a^2 - 230a + 529
-6a + 9 + 324 - 180a = -4a + 4 -230a + 529
-186a + 333 = -234a + 533
48a = 200
a = 200 / 48 = 25/6
b = 23 - (5)(25/6) = 23 - 125/6 = 13/6
(a,b) = (25/6 , 13/6)