Question

Помогитк пожалуйста очень надо

Answer 1

$1)a(7 - 3 + 5) = 9a \\ 1.8x + 2.4x - 2.2x =x(1.8 + 2.4 - 2.2) = 2x \\ \\ 2) \frac{1}{3} a + \frac{2}{ 3} a = a( \frac{1}{3} + \frac{2}{3} ) = a \\ \frac{5}{8} x - \frac{1}{8} x = x( \frac{5}{8} - \frac{1}{8} ) = \frac{4}{8} x = \frac{1}{2} x \\ \\ 3) \frac{1}{2} x - \frac{1}{3} x = x( \frac{1}{2}^{3} - \frac{1}{3}^{2} ) = x( \frac{3}{6} - \frac{2}{6} ) = \frac{1}{6} x \\ \frac{2}{5} a + \frac{3}{10} a = a( \frac{2}{5} ^{2} + \frac{3}{10} ) = a( \frac{4}{10} + \frac{3}{10} ) = \frac{7}{10} a$
держи.