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x -5
x -4
-4x - 5x = - 9x
(x-5)(x-4) = 0
x-5 = 0 x-4 = 0
x= 5 x = 4
CS=(4; 5)
2x -3
2x +1
2x -6x = -4x
(2x-3)(2x+1) = 0
2x-3 = 0 2x +1 = 0
x =