Раскройте скобки: (1) 3(x+y-z); 6) (m-n+2)-5; B) -3,8-(x - y - z); r) (-x-y+z)-(-4,5); e) - (24-56 + 4).

а) 3(x + y - z) = 3 * x + 3 * y - 3 * z = 3x + 3y - 3z

б) (m - n + z) * 5 = m * 5 - n * 5 + z * 5 = 5m - 5n + 5z

в) -3,8 * (x - y - z) = -3,8 * x - (-3,8) * y - (-3,8) * z = -3,8x + 3,8y + 3,8z

г) (-x - y + z) * (-4,5) = -x * (-4,5) - y * (-4,5) + z * (-4,5) = 4,5x + 4,5y - 4,5z

д) -\(\frac{2}{3}\) * (-x + 2y - 3) = -\(\frac{2}{3}\) * (-x) - \(\frac{2}{3}\) * 2y - \(\frac{2}{3}\) * (-3) = \(\frac{2}{3}\)x - \(\frac{4}{3}\)y + 2 = \(\frac{2}{3}\)x - \(\frac{4}{3}\)y + 2

e) -\(\frac{3}{7}\) * (2a - 5b + 4) = -\(\frac{3}{7}\) * 2a - \(\frac{3}{7}\) * (-5b) - \(\frac{3}{7}\) * 4 = -\(\frac{6}{7}\)a + \(\frac{15}{7}\)b - \(\frac{12}{7}\) = -\(\frac{6}{7}\)a + \(\frac{15}{7}\)b - \(\frac{12}{7}\)