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=> -3x + 1 = 5
-3x = 5 - 1
x = - 4/3
x = - 1 1/3
=> -3x + 1 = - 5
-3x = - 5 -1
x = - 6/-3
x = 2
HP = {( -1 1/2 , 2)}
b. | 1 - 5x | = x + 4
=> 1 - 5x = x + 4
-5x -x = 4 -1
-6x = 3
x = - 3/6
x = - 1/2
=> 1 - 5x = - x - 4
-5x + x = - 4 - 1
-4x = -5
x = -5/-4
x = 1 1/4
HP = {( -1/2 , 1 1/4)}