Răspuns :
c)5x-8=0<=>
<=>5x=0+8<=>
<=>5x=8<=>
<=>x=8:5<=>
<=>x=1,6
S={1,6}
<=>5x=0+8<=>
<=>5x=8<=>
<=>x=8:5<=>
<=>x=1,6
S={1,6}
c)5x-8=0<=>
<=>5x=0+8<=>
<=>5x=8<=>
<=>x=8:5<=>
<=>x=1,6
S={1,6}
<=>5x=0+8<=>
<=>5x=8<=>
<=>x=8:5<=>
<=>x=1,6
S={1,6}