Решите Х=2у, 5х+3у=25

Question

Решите
Х=2у,
5х+3у=25

Answer 1

5*2y+3y=25
10y+3y=25
13y=25
y=25/13
y=1+12/13

Answer 2

{х = 2у,
{5х + 3у = 25,

5*2у + 3у = 25,
13у = 25,
у = 1 12/13,
х = 2 * 1 12/13 = 2 * 25/13 = 3 11/13

Ответ:  (3 11/13;  1 12/13)

Comments

Это дробь? 1 12/13

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да

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да 3 целых 11/13 и 1 целая 12/13