Odpowiedź:
a)
[tex]2(x + 4) + 6x = 8 \\ 2x + 8 + 6x = 8 \\ 8x = 8 - 8 \\ x = 0[/tex]
b)
[tex]5x - 2(x + 4) = 10 \\ 5x - 2x - 8 = 10 \\ 3x = 10 + 8 \\ 3x = 18 | \div 3 \\ x = 6[/tex]
c)
[tex] - 4 + 4(2 - 5x) = - 9 \\ - 4 + 8 - 20x = - 9 \\ - 20x = - 9 + 4 - 8 \\ - 20x = - 13 | \div - 20 \\ x = \frac{13}{20} [/tex]
