Question

упростить эти 2 пж даю 20 балов

Answer 1

Ответ:

вот...........................

Answer 2

$-\frac{3}{4} x-x+\frac{1}{4} x = -\frac{3}{4} x-\frac{4}{4} x+\frac{1}{4} x =\frac{-3-4+1}{4} x = -\frac{6}{4} x = -\frac{3}{2} x = -1\frac{1}{2} x\\\\\\\frac{5}{6} c-1\frac{2}{3} c+\frac{3}{4} d+\frac{1}{4} d = \frac{5}{6} c-\frac{5}{3} c+\frac{3+1}{4} d = \frac{5}{6} c-\frac{10}{6} +\frac{4}{4} d = -\frac{5}{6} c+d$