Question

Gasiti nr. naturale x si y astfel incat :
a) (x+1)*(y+2)=12
b) xy+x+y=14
va rog sa explicati

Answer 1

(x+1)(y+2)=12
xy+y+2x+2=12
xy+2x+y=10
xy+x+y=14
xy+2x+y-(xy+x+y)=10-14
xy+2x+y-xy-x-y=-4
x=-4
(-4+1)(y+2)=12
y+2=-4
y=-6