Bài 2 Tìm xZ biết :1) x – 2 = –62) –5x – (–3) = 13 3) 15– ( x –7 ) = – 21 4) 3x + 17 = 25) 45 – ( x– 9) = –35 6) (–5) + x = 15 7) 2x – (–17) = 15 8) |x – 2| = 3.9) | x – 3| –7 = 13 10) 72 –3.|x + 1| = 9 11) 17 – (43 – ) = 45 12) 3| x – 1| – 5 = 7 13) –12(x - 5) + 7(3 - x) = 5 14) (x –...
Đọc tiếp
Bài 2 Tìm x
Z biết :
1) x – 2 = –6 2) –5x – (–3) = 13 3) 15– ( x –7 ) = – 21 4) 3x + 17 = 2 5) 45 – ( x– 9) = –35 6) (–5) + x = 15 7) 2x – (–17) = 15 8) |x – 2| = 3. 9) | x – 3| –7 = 13 10) 72 –3.|x + 1| = 9 11) 17 – (43 – 12) 3| x – 1| – 5 = 7
| 13) –12(x - 5) + 7(3 - x) = 5 14) (x – 2).(x + 4) = 0 15) (x –2).( x + 15) = 0 16) (7–x).( x + 19) = 0 17) 18) 19) (x – 3)(x – 5) < 0 20) 2x2 – 3 = 29 21) –6x – (–7) = 25 22) 46 – ( x –11 ) = – 48 |
) = 45 
