Ta có:
\(Ư\left(35\right)=\left\{\pm1;\pm5;\pm7;\pm35\right\}\\ \Rightarrow\left(2x+1\right),\left(2y-3\right)\in\left\{\left(5,7\right);\left(7,5\right);\left(-5;-7\right);\left(-7,-5\right);\left(1;35\right);\left(35,1\right);\left(-1,-35\right);\left(-35,-1\right)\right\}\\ \Rightarrow\left(x,y\right)\in\left\{\left(2,5\right);\left(3,4\right);\left(-3,-2\right);\left(-4,-1\right);\left(0,19\right);\left(17,2\right);\left(-1,-16\right);\left(-18,1\right)\right\}\)
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