Solve the system of equations using substitution.
2x - y = 2
2x + y = 6

Assign each group a class of immune modulators (interferons, interleukins, immune suppresants, interleukin receptor antagonist, monoclonal antibiotics). each group prepares flash cards for the assigned group of medications. flash cards to include common drugs in the immune-modulator group, therapeutic actions, indications, pharmacokinetics, contraindications, common adverse reactions, and important drug-drug interactions. combine all flash cards and divide among groups for review. continue passing cards among groups until all groups have completed each set.