Question

3 x-5/2 x +1€z determinați x€ z .

Answer 1

2x+1 | 3x-5 /•2 => 2x+1 | 6x-10
2x+1 | 2x+1 /•3 => 2x+1 | 6x+3

2x+1 | 13
2x+1 € divizorilor lui 13
2x+1 € {-13; -1; 1; 13} /-1
2x € {-14; -2; 0; 12} /:2
x € {-7; -1; 0; 6}