Question

1.Rezolvati in Mulțimea numerelor naturale Ecuația :3•(2x+1)-1=32

2.Rezolvati in Mulțimea numerelor naturale inecuatia :5x+1_<26

Answer 1

a) 3.(2x+1)-1=32 (3.2x+3.1)-1=32 5x+3-1=32 5x+2=32 5x=32-2 5x=30 x=30:5 x=6 b)5x+1<26 5x<26-1 5x<25 x<25:5 x<5 x={1,2,3,4}