Răspuns :
5+2(2X+1)=5(X-1)
5+4X+2=5X-5
5+5+2=5X-4X
12=X
verificare
5+2(2*12+1)=5(12-1)
5+2(24+1)=5*11
5+2*23=55
5+46=55
55=55
sper ca te-am ajutat
5+4X+2=5X-5
5+5+2=5X-4X
12=X
verificare
5+2(2*12+1)=5(12-1)
5+2(24+1)=5*11
5+2*23=55
5+46=55
55=55
sper ca te-am ajutat