Question

Как решать? помогите пожалуйста( ​

Answer 1

Ответ:

1)-21

2)$\frac{1}{3}$

Пошаговое объяснение:

1)$\frac{2x - 4 + 3(-x + 1)}{4} = \frac{6.5}{1.3}\\\\\\\frac{2x - 4 - 3x + 3}{4} = \frac{6.5}{1.3} = > \frac{-x - 1}{4} = \frac{6.5}{1.3}$ теперь перемножаем крест накрест :

$6.5 * 4 = 1.3(-x-1) = > 26 = -1.3x-1.3 \\-1.3x = 26 + 1.3 = > x = -\frac{27.3}{1.3} = -21$

2)$> \frac{2x+2-4x}{5} = \frac{0.8}{3} = > \frac{2-2x}{5} = \frac{0.8}{3}$ теперь перемножаем крест накрест :

$5*0.8 = 3*(2-2x) = > 4 = 6 - 6x = > -6x = 4-6 = > x = \frac{-2}{-6} = \frac{1}{3}$

Answer 2

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