Ответ:
0.9x - (0.7x + 0.6y) = 0.9x - 0.7x - 0.6y = 0.2x - 0.6y = - 0.6y + 0.2x = - 0.2 (3y-x)
3y-x = 9
-0.2*9 = - 1.8
Пошаговое объяснение:
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Ответ:
0.9x - (0.7x + 0.6y) = 0.9x - 0.7x - 0.6y = 0.2x - 0.6y = - 0.6y + 0.2x = - 0.2 (3y-x)
3y-x = 9
-0.2*9 = - 1.8
Пошаговое объяснение: