\frac{5}{4}\\ x\in(\frac{5}{4};+\infty)" alt="\frac{1 - x}{2} + 3 < 3x - \frac{2x + 1}{4} \ /\cdot4\\2(1-x)+12<12x-(2x+1)\\2-2x+12<12x-2x-1\\-2x-12x+2x<-1-2-12\\-12x<-15\ /:(-12)\\x>\frac{5}{4}\\ x\in(\frac{5}{4};+\infty)" align="absmiddle" class="latex-formula">