=>x(2y+1)-8y-4=10
=>(2y+1)(x-4)=10
=>\(\left(x-4;2y+1\right)\in\left\{\left(10;1\right);\left(-10;-1\right);\left(2;5\right);\left(-2;-5\right)\right\}\)
=>\(\left(x,y\right)\in\left\{\left(14;0\right);\left(-6;-1\right);\left(6;2\right);\left(2;-3\right)\right\}\)