Answer:
21. 5g - f = 25 - f
22. 100 - 3b = 6b
23. 4 (14 + c) = A2
24. 8o = 52
25. 12f = 30
26. 21 + 2w = P
27. f - 32 (5 / 9) = C
28. D = m / v
29. prt = I
Better understanding...
24. Let "o" refer to the number of octaves
25. Let "f" refer to the number of flats
26. Let "p" represent the Perimeter, Let "l" represent the length, Let "w" represent the width
28. Let "d" represent the density, Let "m" represent the mass, Let "v" represent the volume
29. Let "i" represent the simple interest
Sorry, this took so long.. Hopefully this helps! Feel free to mark barinliest!