x+1/5≤3/4
20x+4≤15
20x≤11
x≤11/20
daca cerinta este in R avem x∈(-∞,11/20]
b)
x-3/4<1/7
28x-21<4
28x<25
x<25/28
x∈(-∞,25/28)
c)
4/3-x≤1/6
8-6x≤1⇒-6x≤-7|-1⇒
6x≥7
x≥7/6
x∈[7/6,+∞)
d)
6x/35<3/7
6x<15
x<15/6
x<5/2
x∈(-∞,5/2)
e)
x+3x/4≤2
4x+3x≤8
7x≤8
x≤8/7
x∈(-∞,8/7)
f)
2x-x/3≤5
6x-x≤15
5x≤15
x≤3
x∈(-∞,3]
