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18-05-2019
Mathematics

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Which of the following is the solution for 9<=1-4x<21

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wegnerkolmp2741o wegnerkolmp2741o

20-05-2019

Answer:

-5 < x <=-2

Step-by-step explanation:

9<=1-4x<21

Subtract 1 from each side

9 -1<=1-1-4x<21-1

8 <= -4x < 20

Divide each side by -4. That means to flip all inequalities

8/-4 >= -4x/-4 >20/-4

-2 >=x > -5

-5 < x <=-2

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