Question

0.1x + 9 ≤ 45 what is x?

Answer 1

Ok solve it as a problem 
0.1x +9=45 

Subtract 9 from both sides and then have 
0.1x=36
then take and do each side divided by 0.1

x=360

Answer 2

Hi Robles928518, 

0,1x + 9 ≤ 45
0,1x ≤ 45 - 9
0,1x ≤ 36
x ≤ 360

x ∈ ] - ∞ ; 360 ]