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OpenStudy (anonymous):
hi...
where is the inequality?
OpenStudy (anonymous):
5x < 45
OpenStudy (anonymous):
\[x <\frac{ 45 }{5 }\]
OpenStudy (anonymous):
solve
OpenStudy (anonymous):
divide both sides by five and you will get the equation above...then solve
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OpenStudy (anonymous):
i have no clue at all how to do any of this kind of math
OpenStudy (debbieg):
If you had 5x=45, would you know how to solve for x?
OpenStudy (uri):
x <45/5
Just divide it @mathematicshead
OpenStudy (anonymous):
45/5=9
OpenStudy (uri):
Yes
So
x>9 ans
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OpenStudy (anonymous):
thank you all very much :)
OpenStudy (debbieg):
Just solve inequalities just like equalities, with the ONE extra rule that:
If you multiply OR divide by a NEGATIVE NUMBER, you must FLIP the direction of the inequality sign.
OpenStudy (amistre64):
you dont need any extra rules if you simply apply the negative principle to equalities as well ...
OpenStudy (amistre64):
since = flips to =, it may seem a bit redundant. But its worth the effort to generalize as a rule as opposed to learning different sets of rules.
OpenStudy (debbieg):
I never thought of it that way @amistre64 ..... but good point! :)