Question

помогите нужно срочно ​25 баллов

Answer 1

$- 7(9x - 1) + 3( - 5 + 4x) = - 63x + 7 - 15 + 12x = - 51x - 8$

$4.5(2z + 4) - 3.2( - 5 - 6z) = 9z + 18 + 16 + 19.2z = 28.2z + 34$

$14( \frac{3}{14} z - \frac{5}{14} ) - 3( \frac{1}{3} z - \frac{2}{3} ) = \frac{14 \times 3}{14} z - \frac{14 \times 5}{14} - \frac{3 \times 1}{3} z + \frac{3 \times 2}{3} = 3z - 5 - z + 2 = 2z - 3$

$\frac{2}{5} (10y - 5) - (6y + 3) = \frac{2 \times 10}{5} y - \frac{2 \times 5}{5} - 6y - 3 = 4y - 2 - 6y - 3 = - 2y - 5$