How many nonnegative integer solutions are there to the pair of equations
x1 + x2 + x3 + … + x7 = 37, x1 + x2 + x3 = 6? How many of these solutions
have x1, x2, x3 positive?
(Discrete Math)
EXPERT ANSWER


How many nonnegative integer solutions are there to the pair of equations
x1 + x2 + x3 + … + x7 = 37, x1 + x2 + x3 = 6? How many of these solutions
have x1, x2, x3 positive?
(Discrete Math)