[tex]2+x+x+1>6-x \wedge 2x+6-x>x+1 \wedge x+1+6-x>2+x\\3x>3 \wedge 6>1 \wedge x<5\\x>1 \wedge x\in\mathbb{R} \wedge x<5\\x\in(1,5)[/tex]
