When m is a value, the solutions X and y of the equations {6x + 2Y = 2m + 1,4x + 3Y = 11-M are all positive numbers!

Consider m as a constant
6x+2y=2m+1
4x+3y=11—m
Formula 1 * 3-2 * 2
10x=8m-19
x=（8m-19）/10
Substituting 1, y = (31-7m) / 5
x. Y are all positive numbers, i.e. (8m-19) / 10 > 0
(31-7m) / 5 > 0
19/8

When x = 4, the value of equation 5 (x + b) - 10 is equal to that of BX + 4x=______ ．

According to the meaning of the question, we can get: 5 (x + b) - 10 = BX + 4x, substituting x = 4 into 5 (x + b) - 10 = BX + 4x, we can get: 5 × (4 + b) - 10 = 4B + 4 × 4, the solution is: B = 6

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