Предмет: Математика, автор: oksanabatalina

Определите, сколько денег у Тамары и у ее Брата, исходя из следующих условий: если Тамара отдаст брату 25,5руб., то денег у них будет поровну; если брат даст Тамаре 25,5руб., то у Тамары окажется в 3 раза больше денег, чем останется у Брата.

Ответы

Автор ответа: Аноним

X ( руб ) денег у Тамары
Y ( руб ) денег у брата
------------------------------
X - 25,5 = Y + 25,5
3 * ( Y - 25,5 ) = X + 25,5
-----------------------------
X = Y + 25,5 + 25,5
X = Y + 51
-----------------
3Y - 76,5 = X + 25,5
3Y - 76,5 = Y + 51 + 25,5
3Y - Y = 76,5 + 76,5
2Y = 153
Y = 76,5 (руб) денег у брата
X = 76,5 + 51 = 127,5 (руб) денег у Тамары

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