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

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.