Question

Determinați x,y€N,știind ca 3*x*y-2y=38 si x*y+2=16.

Answer 1

3*x*y-2y=38
x*y+2=16
x,y=?

x*y+2=16
x*y=16-2
x*y=14

3*x*y-2y=38
3*14-2y=38
42-2y=38
2y=42-38
2y=4
y=4:2
y=2

x*y=14
x*2=14
x=14:2
x=7