16. $2 per 4 lbs --> 200 cents per 4 lbs
4x = 200
x = 50 cents per lbs
17. 3 apples per pound, each pound is 50 cents
3x = 50
x = 17 cents per apple
18. $1.98 per 12 eggs --> 198 cents per 12 eggs
12x = 198
x = 17
19. $1.98 per dozen eggs, $11.88 total
1.98x = 11.88
x = 6 dozens
20. $69.24 per four pairs of shoes
4x = 69.24
x = $17.31
21. One shoe costs $17.31, bought one pair
0.5x = 17.31
x = $34.62
22.
6x = 72
x = 72/6
x = 12
23.
4x = 200
x = 200/4
x = 50
24.
3x = 50
x = 50/3 approximately 16.67
25.
12x = 25.80
x = 25.80/12
x = 2.15
26.
x/2 = 17.31
x = 17.31*2
x = 34.62
27.
4x = 69.24
x = 69.24/4
x = 17.31
28.
12x = 198
x = 198/12
x = 16.5
29.
1.98x = 11.88
x = 11.88/1.98
x = 6
30.
x/4 = 2
x = 2*4
x = 8
31.
Problem 16 --> equation 23
Problem 17 --> equation 24
Problem 18 --> equation 28
Problem 19 --> equation 29
Problem 20 --> equation 27
Problem 21 --> equation 26