Practice Questions
| 1. | Find the value of the variable for equations having no solution Difficulty: medium | 
                                    
                                    4
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| 2. | Find the value of the variable for equations having infinitely many solutions Difficulty: medium | 
                                    
                                    4
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| 3. | Determine the value of 'a' and 'b' Difficulty: hard | 
                                    
                                    6
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