Odpowiedzi

2009-12-10T02:03:37+01:00
1. -6 + 2x = 3x + 1
-6-1=-2x+3x
-7=5x /:-7
x = 5/7

2. 7x - 1 < 6

7x<1+6/:7
x<1

3. -3x ≤ 21/-3
x≥7

4. 3 (2x + 2) > 7
6x+6>7
6x>-6+7/:6
x>1/6

5. x - 4 ≤ 2

6. 17 - x < 12

7. 2 (x - 4) ≥ 12

8. 3x + 15 > 5x - 3