Question

5/7:х+2 2/5 =3 1/4
дам 20 баллов!!!!!! решите!!!!!!

Answer 1

$\displaystyle \frac{5}{7}:x+2\frac{2}{5}=3\frac{1}{4},x\neq 0\\\\ \frac{5}{7}*\frac{1}{x}+\frac{12}{5}=\frac{13}{4}\\\\ \frac{5}{7x}+\frac{12}{5}=\frac{13}{4}\\\\ \frac{5}{7x}=\frac{13}{4}-\frac{12}{5}\\\\ \frac{5}{7x}=\frac{17}{20}\\\\ 100=119x\\119x=100\\\\ x=\frac{100}{119}$

Answer 2

Пошаговое объяснение:

$\frac{5}{7} \div x + 2 \times \frac{2} 5 = 3 \times \frac{1}{4} \\ \frac{5}{7} \div x + 2 \frac{2}{5} = 3 \times \frac{1}{4} x = 0 \\ \frac{5}{7} \times \frac{1}{x} + \frac{12}{5} = \frac{13}{4} \\ \frac{5}{7x} + \frac{12}{5} = \frac{13}{4} \\ \frac{5}{7x } = \frac{13}{4} - \frac{12}{5} \\ \frac{5}{7x} = \frac{17}{20} \\ 100 - 119x \\ \\ 119 x= 100 \\ x = \frac{100}{119} x = 0 \\ x = \frac{100}{119}$

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