Question

1/7(7/8х+7)-3/4(2/9х+1 7/9)= 1/12
5/27(5,4-8,1х)=0,03+4/17(6,8-3,4х)
0,9х-0,6(х-3)=2(0,2х-1,3)
Пожалуйста помогите с примерами

Answer 1

Пошаговое объяснение:

Цифровой понос и я незнаю ответа :3

Answer 2

Ответ:

$\frac{1}{7} ( \frac{7}{8} x + 7) - \frac{3}{4} ( \frac{2}{9} x + 1 \frac{7}{9} ) = \frac{1}{12} \\ \frac{1}{8} x + 1 - \frac{1}{6} x - \frac{4}{3} = \frac{1}{12} \\ \frac{3 - 4}{24} x + 1 - \frac{4}{3} - \frac{1}{12} = 0 \\ - \frac{1}{24} x + ( \frac{12 - 16 - 1}{12} ) = 0 \\ - \frac{1}{24} x - \frac{29}{12} = 0 \\ - \frac{1}{24} x = \frac{29}{12} \\ x = \frac{29}{12} \div ( - \frac{1}{24} ) \\ x = - \frac{29 \times 24}{12 \times 1} \\ x = - 58$

Пошаговое объяснение:

$\frac{5}{27} (5.4 - 8.1x) = 0.03 + \frac{4}{17} (6.8 - 3.4x) \\ \frac{5}{27} ( \frac{27}{5} - \frac{81}{10} x) = \frac{3}{100} + \frac{4}{17} ( \frac{34}{5} - \frac{17}{5} x) \\ 1 - \frac{3}{2} x = \frac{3}{100} + \frac{8}{5} - \frac{4}{5} x \\ 1 - \frac{3}{2} x - \frac{3}{100} - \frac{8}{5} + \frac{4}{5} x = 0 \\ - \frac{7}{10} x - \frac{63}{100} \\ x = \frac{63}{100} \div ( - \frac{7}{10} \\ x = - \frac{63 \times 10}{100 \times 7} \\ x = \frac{9}{10} = 0.9$

$0.9x - 0.6(x - 3) = 2(0.2x - 1.3) \\ 0.9x - 0.6x + 1.8 = 0.4x - 2.6 \\ 0.9x - 0.6x + 1.8 - 0.4x + 2.6 = 0 \\ - 0.1x + 4.4 = 0 \\ - 0.1x = - 4.4 \\ x = - 4.4 \div ( - 0.1) \\ x = 44$