Asked by Alan
Solve -4x is less then equal to -16.
I got x is less then equal to 4.
Is this correct I'm kind of confused with this question.
I got x is less then equal to 4.
Is this correct I'm kind of confused with this question.
Answers
Answered by
Steve
what's wrong with symbols?
-4x <= -16
divide by -4 to get
x >= 4
Another way to avoid multiplying by negative values and worrying about the direction of the inequality, is to make sure all values are positive.
-4x <= -16 -- add 4x to both sides
0 <= 4x-16 -- add 16 to both sides
16 <= 4x
4 <= x
which is the same answer. Multiplying/dividing by a negative value is just a shortcut for moving the item to the opposite side of the inequality.
-4x <= -16
divide by -4 to get
x >= 4
Another way to avoid multiplying by negative values and worrying about the direction of the inequality, is to make sure all values are positive.
-4x <= -16 -- add 4x to both sides
0 <= 4x-16 -- add 16 to both sides
16 <= 4x
4 <= x
which is the same answer. Multiplying/dividing by a negative value is just a shortcut for moving the item to the opposite side of the inequality.
Answered by
Kuai
-4x <= -16
x => 4
x => 4
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