Question

Rezolva ecuatiile: x+4supra9=2supra3;3intregi 1supra4+x=4;,x+8supra13=1

Answer 1

x+4/9=2/3
x=2/3-4/9
x=6/9-4/9
x=2/9
S={2/9}

13/4+x=16/4
x=16/4-13/4
x=3/4
S={3/4}

x+8/13=13/13
x=13/13-8/13
x=5/13
S={5/13}