Question

1341 помогите пожалуйста ))))​

Answer 1

Ответ:

$1) \frac{ \frac{4}{ \frac{2}{7} + 2 } - x }{2x - \frac{1}{4} } = 6 \\( \frac{4}{ \frac{2}{7} + 2 } - x) \div (2x - 0.25) = 6 \\( \frac{4 \times 7}{16} - x) \div (2x - 0.25) = 6 \\ \frac{7 - 4x}{4} \div \frac{8x - 1}{4} = 6 \\ \frac{(7 - 4x) \times 4}{4 \times (8x - 1)} = 6 \\ 7 - 4x = 6(8x - 1) \\ 7 - 4x = 48x - 6 \\ 13 = 52x \\ \frac{13}{52} = x \\ x = \frac{1}{4} \\ x = 0.25$

$2) \frac{ \frac{x - 5}{3} - \frac{x - 7}{4} }{ \frac{x + 5}{6} - \frac{x + 7}{3} } = - \frac{3}{4} \\ \frac{ \frac{4x - 20 - 3x + 21}{12} }{ \frac{x + 5 - 2x - 14}{6} } = - \frac{3}{4} \\ \frac{(x + 1) \times 6}{12 \times( - 1) ( x + 9)} = - \frac{3}{4} \\ - \frac{x + 1}{ 2(x + 9)} = - \frac{3}{4} \\ 4x + 4 = 6x + 54 \\ - 50 = 2x \\ x = - 25$