Question

Rezolvatii in multimea numerelor naturale ecuatiile precizandmultimea solutiilor S:5(8x+3)-2(x+7)=2(19x+5)-9

Answer 1

5(8x+3)-2(x+7)=2(19x+5)-9⇒
40x+15-2x-14=38x+10-9⇒
40x-2x+1=38x+1⇒
38x-38x=1-1
s=0
sucees

Answer 2

Ecuatia este echivalenta cu:

40x+15-2x-14=38x+10-9

deci

38x-1=38x-1=> x=x (fain) => x apartine multimii nr naturale, oricare ar fi :)