Question

Решите систему;

y-x=7
3^(x)*3^(2(y-1))=27

Answer 1

3^х • 3^(2(y - 1 )) = 27
3^( X + 2y - 2 ) = 3^3
X + 2y - 2 = 3
X + 2y = 5
X = 5 - 2y
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y - X = 7
X = y - 7
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5 - 2y = y - 7
3y = 12
y = 4
X = 4 - 7 = - 3
Ответ ( - 3 ; 4 )