Question

x+21=35,3;3x+1<32,03 In N

Answer 1

Salut
x+21=35,3
x=35,3-21
x=32,3
3x+1<32,03
3x<32,03-1
3x<32,02
x<32,02/3
x<10,673
S:x apartine lui {.........;10,673}