Posted by m on Thursday, September 8, 2011 at 4:58pm.
Yes, you can factor out numbers which are positive as in equations.
4x>16 can be written as
x>4
(common factor 4 is positive.)
If the factor is negative, you can still factor it out, but you will need to reverse the sign of inequality.
-5x ≥ 40
x ≤ 40/(-5)
x ≤ -8
(common factor -5 is negative)
If the sign of the factor is unknown, then you'll have to make different cases:
ax > ab
x > b (if a>0)
x < b (if a<0)
x is undefined if a=0
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