x∈N
a) 0.5*x+0.12≤0.72
0.5x≤0.72-0.12
0.5x≤0.6
x≤1.2
x∈[0; 1]
b) 1.8x+5.97 <12.36
1.8x <12.36-5.97
1.8x < 6.39
x< 3.55
x∈[0;1;2;3]
c) 15.903 -6x ≥ 2.001
15.903-2.001≥ 6x
13.902≥ 6x
x≤ 2.317
x∈[ 0;1;2]
d) x+5.25 < 0.5⁴ *100
x+5.25 < 0.0625*100
x+5.25 < 6.25
x< 6.25-5.25
x <1
x=0
