Question

ПОМОГИТЕ ПЖ ПОЖАЛУЙСТА СРОЧНО ​

Answer 1

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Answer 2

Ответ:

$1)0.6(x - 2) + 4.6 = 0.4(7 + x) \\ 0.6x - 1.2 + 4.6 = 2.8 + 0.4x \\ 0.6x + 3.4 = 2.8 + 0.4x \\ 0.6x - 0.4x = 2.8 - 3.4 \\ 0.2x = - 0.6 \\ x = \frac{ - 0.6}{0.2} \\ x = - 3$

$2) \frac{x - 1}{5 - x} = \frac{2}{9} \\ \frac{x - 1}{5 - x} - \frac{2}{9} = 0 \\ \frac{9(x - 1) - 2(5 - x)}{9(5 - x)} = 0 \\ \frac{9x - 9 - 10 + 2x}{9(5 - x)} = 0 \\ \frac{11x - 19}{9(5 - x)} = 0$

x≠9 и х≠5

$11x - 19 = 0 \\ 11x = 19 \\ x = \frac{19}{11} \\ x =1.72$