When m is an integer, the solutions X and y of the system x + y = m 5x + 3 y = 13 are nonnegative

When m is an integer, the solutions X and y of the system x + y = m 5x + 3 y = 13 are nonnegative

X + y = m, ① 5x + 3Y = 13, ②, ② - ① × 3: 2x = 13-3m, that is, x = 13 − 3M2, substituting x = 13 − 3M2 into ①: y = 5m + 32, according to the meaning of the question: 13 − 3M2 ≥ 05m + 32 ≥ 0, the solution is: - 35 ≤ m ≤ 133, then the integer m = 0, 1, 2, 3, 4