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$�� 6.33. �� :1) {(9^x-4�3^(5-y)+27=0, lg (2y-3x)=lg (4-4x+y));2) {(x^log_3 y+y^log_3 x=18, log_3 x+log_3 y=3);3) {(x^log_8 y+y^log_8 x=4, log_4...$

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6.33. �� :

1) {(9^x-4�3^(5-y)+27=0, lg (2y-3x)=lg (4-4x+y));

2) {(x^log_3 y+y^log_3 x=18, log_3 x+log_3 y=3);

3) {(x^log_8 y+y^log_8 x=4, log_4 x-log_4 y=1);

4) {(log_y x+log_x y=5/2, xy=27);

5) {(log_3 (x+2y)+log_(1/3) (x-2y)=1, x^2+y^2=4+1/2 y);

6) {(x^lg y=2, xy=20).

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