Question

Пожалуйста помогите
Вы получите 35 баллов

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

$5x - 0.8 = 2x - 1.4 \\ 5x - 2x = - 1.4 + 0.8 \\ 3x = - 0.6 \\ x = - 0.6 \div 3 \\ x = - 0.2 \\ \\3x - 2(3x - 1) = 2x + 7 \\ 3x - 6x + 2 = 2x + 7 \\ 3x - 6x - 2x = 7 - 2 \\ - 5x = 5 \\ x = 5 \div ( - 5) \\ x = - 1 \\ \\ \frac{2x}{5} = \frac{x - 3}{7} \\ \frac{2x}{5} \times 35 = \frac{x - 3}{7} \times 35 \\ 14x = 5x - 15 \\ 14x - 5x = - 15 \\ 9x = - 15 \\ x = - 15 \div 9 \\ x = - 1 \frac{2}{3} \\ \\ 0.6 - 1.6(x - 4) = 3(7 - 0.4x) \\ 0.6 - 1.6x + 6.4 = 21 - 1.2x \\ - 1.6x + 1.2x = 21 - 0.6 - 6.4 \\ - 0.4x = 14 \\ x = 14 \div ( - 0.4) \\ x = - 35 \\ \\ \frac{3}{4} ( \frac{1}{2} x + \frac{2}{3} ) = 3x + 2 \frac{1}{4} \\ \frac{3}{8} x + \frac{1}{2} = 3x + 2 \frac{1}{4} \\ \frac{3}{8} x - 3x = 2 \frac{1}{4} - \frac{1}{2} \\ \frac{3}{8} x \times 8- 3x \times 8 = 2 \frac{1}{4} \times 8 - \frac{1}{2} \times 8 \\ 3x - 24x = 18 - 4 \\ - 21x = 14 \\ x = 14 \div ( - 21) \\ x = - \frac{2}{3}$