Răspuns :
35=1x35; 35x1; 5x7; 7x5
x-3=1 x=4
y+4=35 y=31
x-3=35 x=38
y+4=1 y=-3 nu apartine lui N
x-3=5 x=8
y+4=7 y=3
x-3=7 x=10
y+4=5 y=1
raspuns: x,y= 4; 31
8; 3
10; 1
x-3=1 x=4
y+4=35 y=31
x-3=35 x=38
y+4=1 y=-3 nu apartine lui N
x-3=5 x=8
y+4=7 y=3
x-3=7 x=10
y+4=5 y=1
raspuns: x,y= 4; 31
8; 3
10; 1
35=1·35 sau 35=35·1;
⇒x-3=1⇒x=4;sau x-3=35⇒x=38;
⇒y+4=35⇒y=31;
35=5·7 sau 7·5;
⇒x-3=5⇒x=8;sau x-3=7⇒x=10;
⇒y+4=7⇒y=3;sau y+4=5⇒y=1;
⇒x,y∈[[4,31][8,3][10,1]si solutie la care nu apare y;x=38;
⇒x-3=1⇒x=4;sau x-3=35⇒x=38;
⇒y+4=35⇒y=31;
35=5·7 sau 7·5;
⇒x-3=5⇒x=8;sau x-3=7⇒x=10;
⇒y+4=7⇒y=3;sau y+4=5⇒y=1;
⇒x,y∈[[4,31][8,3][10,1]si solutie la care nu apare y;x=38;