If 20 – 4/5 x is greater or equal to 16 then…?

A. X < or = to 5

B. X > 5

C. X > 32 1/2

D. X < 32 1/2

2 Answers

  • The answer to the question is A. What you do, is first get rid of the fraction by multiplying everything by 5. You should then have

    100-4x>=80. Now subtract 100 from each side. Then what your going to want to do is divide each side by -4. Don’t forget that when you divide by a negative number and there is greater than or less than sign, the sign automatically changes the opposite way.

    20-4/5 x>=16

    5(20-4/5 x)>=(16)5

    100-4x>=80

    -4x>=-20

    x<=5

    A.

  • 20 – 4/5x >= 16

    -4/5x >= -4

    4/5x <= 4

    4x <= 20

    x <= 5

    Therefore answer is A.

Leave a Comment