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$�� (1�4).1. {4x+3y=8, 2^y-3�2^((x-3)/2+y)=4}.2. {(5x-4y)/(4x-5y)+12x-15y=11, 6�7^(4x-5y)+7=7^(8x-10y)}.3. {3cos(x)+4sin(y)=2,5,...$

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�� (1�4).

1. {4x+3y=8, 2^y-3�2^((x-3)/2+y)=4}.

2. {(5x-4y)/(4x-5y)+12x-15y=11, 6�7^(4x-5y)+7=7^(8x-10y)}.

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

4. {3/v(x+2)-2/v(y-3)=7, 2/v(x+2)+3/v(y-3)=22}.

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