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Bài 2. Tìm x, biết : a) |x – 3| – 16 = -4 b) 26 - |x + 9| = -13 c) 5 - ( 10 - x) = 7 d) 11 + ( 15 –x) = 1 e) 8x – 75 = 5x +21 g) 9x + 25 = - ( 2x – 58) h) |x + 3| = 4 i) 15 - |2x – 1| = |-8| Bài 3. Tìm các số nguyên x, y biết: a) ( x – 1)( y + 1) = 5 c) (x +2)( y– 1) = 3 b) ( x + 2)( y – 3) = -3 d) ( 3 - x)( xy +5) =-1 g) ( x - 7)( y + 2) = 0 e) |x – 1||y + 1| = 2
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