Ответ:
Пошаговое объяснение:
(x+3)/7+(5-x)/5=(2-x)/2 |*70
10*(x + 3) + 14*(5 - x) = 35*(2 - x)
10x + 30 + 70 - 14x = 70 - 35x
-4x + 100 = 70 - 35x
35x - 4x = 70 - 100
31x = -30
x = -30/31
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Ответ:
Пошаговое объяснение:
(x+3)/7+(5-x)/5=(2-x)/2 |*70
10*(x + 3) + 14*(5 - x) = 35*(2 - x)
10x + 30 + 70 - 14x = 70 - 35x
-4x + 100 = 70 - 35x
35x - 4x = 70 - 100
31x = -30
x = -30/31