1. 3x + 8 = 32 | -8
3x = 24 | :3
x = 8
2. 6x - 5 = 25 | +5
6x = 30 | :6
x = 5
3. 5x + 6 = 31 | -6
5x = 25 | :5
x = 5
4. 4x - 9 = 31 | +9
4x = 40 | :4
x = 10
5. 8x + 6 = 30 | -6
8x = 24 | :8
x = 3
6. 3x - 7 = 47 | +7
3x = 54 | :3
x = 18
7. 3x + 14 = 50 | -14
3x = 36 | :3
x = 13
8. 7x - 1 = 6 | +1
7x = 7 | :7
x = 1
9. 4x + 7 = 47 | -7
4x = 40 | :4
x = 10
10. 8x - 12 = 68 | +12
8x = 80 | :8
x = 10
11. 5x + 2 = 13 | -2
5x = 11 | :5
x = 2,2
12. 3x - 6 = 8 | +6
3x = 14 | :3
x = [tex]\frac{14}{3}[/tex]
x = [tex]4\frac{2}{3}[/tex]
13. 4x + 3 = 22 | -3
4x = 19 | :4
x = [tex]\frac{19}{4}[/tex]
x = [tex]4\frac{3}{4}[/tex]
14. 5x - 2 = 24 | +2
5x = 26 | :5
x = [tex]\frac{26}{5}[/tex]
x = [tex]5\frac{1}{5}[/tex]
15. 9x + 7 = 32 | -7
9x = 25 | :9
x = [tex]\frac{25}{9}[/tex]
x = [tex]2\frac{7}{9}[/tex]
16. 7x - 3 = 20 | +3
7x = 23 | :7
x = [tex]\frac{23}{7}[/tex]
x = [tex]3\frac{2}{7}[/tex]
17. 8x + 8 = 1 | -8
8x = -7 | :8
x = [tex]-\frac{7}{8}[/tex]
18. 2x - 3 = 4 | +3
2x = 7 | :2
x = [tex]\frac{7}{2}[/tex]
x = [tex]3\frac{1}{2}[/tex]
19. 5x + 6 = 3 | -6
5x = -3 | :5
x = [tex]-\frac{3}{5}[/tex]
20. 6x - 3 = 18 | +3
6x = 21 | :6
x = [tex]\frac{21}{6}[/tex]
x = [tex]3\frac{3}{6}[/tex]
x = 3 [tex]\frac{1}{2}[/tex]
Mam nadzieję że pomogłam i liczę na naj. ♥
