Question

Rezolvati in |N inecuatiile:

a) (x+17):3-2x4=( mai mic sau egal) 22

b) 25-75:15+5x < 45

Answer 1

a)[tex](x+17):3-2*4 \geq 22 \\ (x+17):3-8 \geq 22 \\ (x+17):3\geq 30 \\ x+17 \geq 90 \\ x \geq 73[/tex]

=> x poate fi 73, 74, 75,....

b)[tex]25-75:15+5x \ \textless \ 45\\ 25-5 + 5x \ \textless \ 45 \\ 20 + 5x \ \textless \ 45\\ 5x \ \textless \ 25\\ x \ \textless \ 5[/tex]

=> x poate fi 0,1,2,3,4