Solve the formula for c

m=h/c-w

c = h / (m+w)

Step-by-step explanation:

m = (h/c) - w

Add w to each side

m+w=h/c-w+w

m+w = h/c

Multiply each side by c

c (m+w) = h/c*c

c (m+w) = h

Divide each side by (m+w)

c (m+w) / (m+w) = h / (m+w)

c = h / (m+w)