Algebra
posted by G .
Clark's Rule is commonly used to calculate the childresn's dosage of medication:
Clark's Rule is: C=A x W/150
Use the rule to calulate thr problem
C child's dose
A= adult's dose
W=weight of child in pounds
How much would a child need to weigh to receive the adult dosage if the adult dosage 80 cc?

Ask yourself the question in a different way — how could you manipulate the weight factor, so C = A?
I'll let you think about it.
I hope this helps. Thanks for asking.