Prosze o rozwiązanie układu równań.(x+5)(y-2)=(x+2)(y-1)(x-4)(y+7)=(x-3)(y+4)
{(x+5)(y-2)=(x+2)(y-1){(x-4)(y+7)=(x-3)(y+4)
{xy-2x+5y-10=xy-x+2y-2
{xy+7x-4y-28=xy+4x-3y-12
{-2x+5y-10=-x+2y-2
{7x-4y-28=4x-3y-12
{-x+3y=8 |*3
{3x-y=16
{-3x+9y=24
__________
8y=40
y=5
{y=5
{3x-5=16
3x=21
{x=7
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{(x+5)(y-2)=(x+2)(y-1)
{(x-4)(y+7)=(x-3)(y+4)
{xy-2x+5y-10=xy-x+2y-2
{xy+7x-4y-28=xy+4x-3y-12
{-2x+5y-10=-x+2y-2
{7x-4y-28=4x-3y-12
{-x+3y=8 |*3
{3x-y=16
{-3x+9y=24
{3x-y=16
__________
8y=40
y=5
{y=5
{3x-y=16
{y=5
{3x-5=16
{y=5
3x=21
{x=7
{y=5