Odpowiedź:
1)
[tex]\frac{2x}{5}-\frac{6}{5} = \frac{4x}{2}[/tex]
[tex]\frac{2x - 6}{5} = \frac{4x}{2} \ \ \ \ \ /* 10[/tex]
2(2x - 6) = 5 * 4x
4x - 12 = 20x
- 12 = 16x
x = - 0,75
2)
[tex]\frac{7x-1}{2} + 3x = - 4x \ \ \ \ \ /*2[/tex]
2(7x - 1) + 2 * 3x = 2 * (-4x)
14x - 2 + 6x = -8x
-2 = - 28x
[tex]x = \frac{2}{28} = \frac{1}{14}[/tex]
3)
[tex]7x + 6 - 5x = \frac{2}{3}x \ \ \ \ \ /*3[/tex]
21x + 18 - 15x = 2x
4x = - 18
x = - 4,5
4)
[tex]\frac{1}{3} + \frac{2x}{2}+\frac{5x}{3} = \frac{7}{2} \ \ \ \ \ /*6[/tex]
2 + 6x + 10x = 21
16x = 19
[tex]x = \frac{16}{19}[/tex]
