Carol H. answered 08/07/18
Tutor
4.9
(285)
Experienced Mathematics Tutor w/ Master's Degree in Math
4x + 1 - 3 = 12
x + 1 (x + 1)(x - 1)
Multiply both sides of the equation by the LCD, which is (x + 1)(x - 1).
(4x + 1)((x - 1) - 3(x2 - 1) = 12
4x2 - 3x - 1 - 3x2 + 3 = 12
x2 -3x - 10 = 0
(x - 5)(X + 2) = 0
x - 5 = 0 or x + 2 = 0
x = 5 or x = -2