How can I solve for this?

1yr ⋅ ⋅

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Greeting everyone! Can anyone show me how to find the value of a b c or any tips, please? After I attempted to solve it and failed many times. Right now I have no clue how to get the answer.

2yr ⋅

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Does this equation have answers? If it does can u guys show me?

8mo ⋅

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I wonder why the answer is 4. I thought that 3/5 is not integer, right? Or I just didn't understand the concept of the problem. Help please!

1yr ⋅

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