Răspuns :
3-(x+5)=8
3-x-5=8
-x=8-3+5
-x=10 /*-1
x=-10
Verificare
3-(-10+5)=8??
3-(-5)=8?
3+5=8?
8=8 ADEVARAT
3-x-5=8
-x=8-3+5
-x=10 /*-1
x=-10
Verificare
3-(-10+5)=8??
3-(-5)=8?
3+5=8?
8=8 ADEVARAT