Tìm x, biết: a) (x - 3).(x - 2) - (x + 1).(x - 6) = 0; b) (x + 2).(x - 2) - (x - 3).(x + 7) = 2.x - 3

Bài 3. Tìm x, biết:
a) (x - 3).(x - 2) - (x + 1).(x - 6) = 0
b) (x + 2).(x - 2) - (x - 3).(x+ 7) = 2.x - 3
c) (x - 1).(3.x + 1) - 2.x .(x - 5) = x. (x + 5) - 9