Answer:
b = 7c/(dc - 9)
Step-by-step explanation:
Given that:
7/b + 9/c = d
As we have to solve for b
Subtract 9/c from both sides
7/b + 9/c - 9/c = d - 9/c
7/b = d - 9/c
By taking LCM on right side
7/b = (dc-9)/c
By inverting both sides we get:
b/7 = c/ (dc - 9)
Multiplying both sides by 7 we get
b = 7c/(dc - 9)
I hope it will help you!
