From the following data calculate e510 molar absorptivity

Question

A₅₁₀ Cell path length (cm) C_A(M) C_B (M)

0.60  1.00 .015 .0100

.50   0.5   0.020  0.020

From the following data calculate ε₅₁₀ ( molar absorptivity at 510nm) for species A and species B (which are the only two in the solution).

To achive this the equations (Aλ)total = (A)₁ + (Aλ)₂= (l x (ελ₁x C₁) + (l x (ελ)₂x C₂) and C₁ + C₂ =.100(M) need to be solved simultaneously.

So my question is how do I rearrange them to solve them simultaneously?