How many solutions there are to the given equation that satisfy the given condition: $y_1 + y_2 + y_3 + y_4 =30$, each $y_i$ is an integer that is at least $2$.
I don't know how to start this question.
2025-01-13 06:20:44.1736749244
Number of integral solutions to $y_1 + y_2 + y_3 + y_4 =30$ with $y_i \ge 2$
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