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$�� 15.5. �� :1) {vx+vy=5, x+y+4v(xy)=37}; 2) {x^(1/3)+y^(1/3)=3, xy=8};3) {(x+y)^(1/4)+(x-y)^(1/4)=4, v(x+y)-v(x-y)=8};4)...$

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15.5. �� :

1) {vx+vy=5, x+y+4v(xy)=37};

2) {x^(1/3)+y^(1/3)=3, xy=8};

3) {(x+y)^(1/4)+(x-y)^(1/4)=4, v(x+y)-v(x-y)=8};

4) {v(4-x+y)+v(9-2x+y)=7, 2y-3x=12}.

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