Question

2 pe 5 mai mic decat 2 n + 3 pe 15 mai mic decât 4 pe 3

Answer 1

2/5<2n+3/15<4/3
2/5<2n+3/15
2n>2/5-1/5
2n>1/5
n>1/5:2
n>1/5*1/2
n>1/10
n>0,1
2n+3/15<4/3
2n<4/3-3/15
2n<20/15-3/15
n<17/15*1/2
n<17/30
n<0,57
0,1<n<0,57     n=0,2;0,3;0,4;0,56