Question

математиеа рівняння 6 клас розвязати

Answer 1

Ответ:

$\frac{x - 2}{x - 3} = \frac{7}{5 } \\ 5x - 10 = 7x - 21 \\ 5x - 7x = 10 - 21 \\ - 2x = - 11 \\ x = 5.5$

$\frac{x + 0.3}{5} = \frac{0.2 - x}{3} \\ 3x + 0.9 = 1 - 5x \\ 3x + 5x = 1 - 0.9 \\ 8x = 0.1 \\ x = 0.0125$

$\frac{x - 5}{x + 3} = \frac{9}{7} \\ 7x - 35 = 9x + 27 \\ 7x - 9x = 27 + 35 \\ - 2x = 62 \\ x = - 31$

$\frac{x - 2}{3} = \frac{x + 2}{5} \\ 5x - 10 = 3x + 6 \\ 5x - 3x = 1 0 + 6 \\ 2x = 16 \\ x = 8$

$\frac{x - 1}{5} = \frac{x + 5}{7} \\ 7x - 7 = 5x + 25 \\ 7x - 5x = 25 + 7 \\ 2x = 32 \\ x = 16$

$0.3(8 - 3x) = 3.2 - 0.8(x - 7) \\ 2.4 - 0.9x = 3.2 - 0.8x + 5.6 \\ - 0.9x + 0.8x = 5.6 + 3.2 - 2.4 \\ - 0.1x = 6.4 \\ x = - 64$