Odpowiedź:
a, c, d, e, f
Szczegółowe wyjaśnienie:
a) -5x + 3 = 9 - 2x /-9 + 5x
3x = - 6 / : 3
x = -2
b) 6 - 3,5x = 2 - 1,5x / + 3,5x - 2
2x = 4 / : 2
x = 2
c) 6x + 4 = -10 - x / +x - 4
7x = -14 / : 7
x = -2
d) 1 - 0,5x = 0 / - 1
0,5x = -1 / * 2
x = -2
e) [tex]1\frac{2}{3} + \frac{1}{3}x = 1[/tex] / [tex]- 1\frac{2}{3}[/tex]
[tex]\frac{1}{3}x = - \frac{2}{3}[/tex] / * 3
x = -2
f) [tex]\frac{x - 3}{5} = \frac{x}{2}[/tex]
[tex]\frac{1}{5}x - \frac{3}{5} = \frac{1}{2}x[/tex]
[tex]\frac{2}{10}x - \frac{3}{5} = \frac{5}{10}x[/tex] / [tex]- \frac{2}{10}x[/tex]
[tex]- \frac{6}{10} = \frac{3}{10}x[/tex] / [tex]* \frac{10}{3}[/tex]
x = -2
