Question 118954
X+4X<3(1+X)
5X<3+3X
5X-3X<3
2X<3
X<3/2
X<1.5 ANSWER.
PROOF:
LET X=1.4
1.4+4*1.4<3(1+1.4)
1.4+5.6<3*2.4
7<7.2