6(3-2x) = 7(2-3x)
18 - 12x = 14 - 21x
-12x + 21x = 14 - 18
9x = -4
$$x = -\frac{4}{9}$$
Ответ: $$x = -\frac{4}{9}$$
$$\frac{5x+7}{3} = \frac{4}{5}$$
5(5x+7) = 3 × 4
25x + 35 = 12
25x = 12 - 35
25x = -23
$$x = -\frac{23}{25}$$
Ответ: $$x = -\frac{23}{25}$$