Answer:
c = d/4
Step-by-step explanation:
solve this literal equation using inverse operations:
4c = d
/4 /4
c=1/4d
Let, Unknown number = x
8x-51 = 53
8x = 53+51
x = 104/8
x = 13
52 students were in each bus
475-7=468÷9=52 so 52