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$�� (1�4).1. {3x-4y=1, 2^x+2^((x+7)/2-y)=16}.2. {2x/(3x-y)+15x-5y=7, 11�12^(3x-y)+12=12^(6x-2y)}.3. {4sin(x)+cos(y)=1,...$

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�� (1�4).

1. {3x-4y=1, 2^x+2^((x+7)/2-y)=16}.

2. {2x/(3x-y)+15x-5y=7, 11�12^(3x-y)+12=12^(6x-2y)}.

3. {4sin(x)+cos(y)=1, 3sin(x)+cos(y)=2,5}.

4. {4/v(x+2)-3/v(y-1)=3, 2/v(x+2)+3/v(y-1)=3}.

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