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damlinh1920
2 năm trước
C1 : 3x - 17 = x + 3 C2 :25 - ( x - 5 ) = -415 - ( 15 - 415 ) C3 : |x - 3|-12 =|-5| C4 : (2x- 15) (3-x) = 0 C5 : 2x - 15 = -47
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