Ответ:
x = 6.72
Пошаговое объяснение:
11,5x + (x+21) = 105
11,5x + x + 21 = 105
12.5x = 105 - 21
12.5x = 84
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Ответ:
x = 6.72
Пошаговое объяснение:
11,5x + (x+21) = 105
11,5x + x + 21 = 105
12.5x = 105 - 21
12.5x = 84
x = 6.72