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x -1/4 < 4x - 1/2
x-4x <-1/2 +1/4
-3x < -1/4/:-3
x > 1/12
4. 2x+1/4 – x >/ 1-x/2
x +1/4 >/ 1 -x/2 /*2
2x + 1/2 >/ 2 -x
2x +x >/2- 1/2
3x >/ 3/2 /:3
x>/ 1/2
1 x-9/4-6x-1;3>/=x-6x>/9/4+1*3=-5x>/9/4+3=-5x>/3 i 9/4=3 i 9/4:(-5)=x</21/4*(-1/5)=x</-21/10
3