envycierra17 envycierra17 07-06-2023 Mathematics contestada 1. Use the elimination strategy to solve this linear system:(1) 12c + 28d = 12 (2) -20c + 16d = 168 2. Determine the number of solutions of this linear system: (1) 7x − 3y = 43 (2) 7x - 3y = 13