Odpowiedź:
a)
[tex]3x - 4 = 9x + 2 \\ 3x - 9x = 2 + 4 \\ - 6x = 6 \\ x = - 1[/tex]
b)
[tex] \frac{3}{4} x + 8 = 2x - 1 \\ \frac{3}{4x} - 2x = - 1 - 8 \\ - \frac{5}{4} x = - 9 \\x = - 9 \times ( - \frac{4}{5} ) \\ x = \frac{36}{5} \\ x = 7 \frac{1}{5} [/tex]
c)
[tex]2(3x - 4) = 6 \\ 6x - 8 = 6 \\ 6x = 6 + 8 \\ 6x = 14 \\ x = 2 \frac{1}{3} [/tex]
d)
[tex] \frac{ x + 6}{3} - 4 = - 2x \\ x + 6 - 12 = - 6x \\ x + 6x = 6 \\ 7x = 6 \\ x = \frac{6}{7} [/tex]
e)
[tex]3(4x + 8) - 8x = 7(2x - 6) + 3x \\ 12x + 24 - 8x = 14x - 56 + 3x \\ 12x - 8x - 14x - 3x = - 56 - 24 \\ - 13x = - 70 \\ x = \frac{70}{13} \\ x = 5 \frac{5}{13} [/tex]
proszę o naj :)
