You are making sets of pens and pencils to sell. You want each set to contain the same combination of pens and pencils. You have 28 28
pens and 80
80
pencils, and you want to use them all. What is the greatest number of these sets you can make?

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5