Question 934312
<pre>
Two approaches:

Approach 1:

{{{-4t}}}{{{""<=""}}}{{{48}}}

Add 4t to both sides and subtract 48 from both sides:

{{{-48}}}{{{""<=""}}}{{{4t}}}

Divide both sides by 4

{{{-12}}}{{{""<=""}}}{{{t}}}

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Approach 2:

{{{-4t}}}{{{""<=""}}}{{{48}}}

Divide both sides by -4, remembering the rule that
when dividing both sides by a negative number, we
must change the direction of the inequality.

{{{t}}}{{{"">=""}}}{{{-12}}}

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The answers are equivalent.  You learn from approach 1 that
it is always possible to avoid having to switch the order 
of the inequality.

Edwin</pre>