Question

rez in z cele 4 inecuatii:
-7x≥-3x+12
-3x≤-8x
3x-1≤-2x+4
2x-1≥x+5

Answer 1

a) [tex]-7x \geq -3x+12\\ -4x\geq 12 | :-4\\ x \leq -3 \Rightarrow x \in \lbrace...,-5,-4,-3\rbrace[/tex]

b) [tex]-3x \leq -8x\\ 5x \leq 0\\ x \leq 0 \Rightarrow x \in \lbrace...-2,-1,0\rbrace[/tex]

c) [tex]3x-1 \leq -2x+4\\ 5x \leq 5\\ x \leq 1 \Rightarrow x\in \lbrace ...,-1,0,1\rbrace[/tex]

d) [tex]2x-1 \geq x+5\\ x \geq 6 \Rightarrow x\in \lbrace6,7,8,...\rbrace[/tex]