{ "name": "Linear Systems", "order": 15, "challenges": [ { "id": "59a5801209a6acac5983b458", "title": "Consistent and Inconsistent Linear Systems", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] }, { "id": "59a587af21a188128bc4071a", "title": "Checking a Solution for a Linear System", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] }, { "id": "59a587af21a188128bc4071c", "title": "Graphs of Linear Systems", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] }, { "id": "59a587af21a188128bc4071d", "title": "Systems of Linear Equations in Two Variables", "description": [ "" ], "challengeSeed": [ "" ], "tests": [ "" ] } ] }