Asked by Mikayla
solve the inequality -3n<81
Answers
Answered by
Steve
divide by -3:
n > -27
Note that multiplying by a negative value changes the direction of the inequality. It's just shorthand for moving things to the other side:
-3n < 81
add 3n:
0 < 3n+81
subtract 81:
-81 < 3n
divide by 3:
-27 < n
which is the same as n > -27
n > -27
Note that multiplying by a negative value changes the direction of the inequality. It's just shorthand for moving things to the other side:
-3n < 81
add 3n:
0 < 3n+81
subtract 81:
-81 < 3n
divide by 3:
-27 < n
which is the same as n > -27
Answered by
Ms.Cavill
mainly what you are trying to do is get the n by itself.
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