Answer:

Step-by-step explanation:
we have

step 1
Solve the numerator of the quotient

step 2
substitute in the original expression


step 3
simplify

Answer:
c = (d/a) - b
Step-by-step explanation:
a(c + b) = d
Divide both sides by a
c + b = d/a
subtract b from both sides
c = (d/a) - b