exam Maths Puzzle Numerical Ability

How do you know when an equation has an infinitely number of solutions or when an equation has no solution?

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exam Other Question

Find a value for k so that 9mto the power of 2 - kn to the power 2 will have the factors 3m + 7n and 3m + 7n. Can someone help me on this problem?

I need to solve this problem and show the equation used for the solution:

A coffee merchant has coffee beans that sell for #9 per pou