1. The problem statement, all variables and given/known data Consider the following system of equations da/dt = -kab, db/dt = kab, a(0) = a0, b(0) = b0. Solve these equations exactly. 2. Relevant equations 3. The attempt at a solution I added them together to get d(a+b)/dt = 0 which implies a + b = a0 + b0. Therefore a = a0 + b0 - b so eliminating a we get db/dt = k(a0 + b0 - b)b which is separable, but I don't know where to go from here. Someone please help.