Exam Maths Puzzle Algebra

Solve
2/x + 3/x = 19

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Exam Other Question

Solve for A and B in the following problems:

1) 4A+B = 16, 2A = 3B =24

2) A+B=6, 2A+B=8 Is it possible to have a regular polygon with interior angles measuring 15 degrees? If so how many sides does it have?