I want to know the value C2=? from a*b*(C2-C1)

Question

Is it the same for C1?  Thank you in advance!

Answer 1

Problem: I want to know the value C2=? from a*b*(C2-C1)
Is it the same for C1?  Thank you in advance!

We need more information. All you have given us is
an expression, with no context. We need at least one
equation with a value. Looking at the expresion, we
probably need more than one equation.