# math

posted by
**Stark** on
.

How many ordered tuples of 7 integers x1,x2,x3,x4,x5,x6,x7 are there, such that

x1+x2+x3+x4+x5+x6+x7−x1x2x3x4x5x6x7=6,

and 1≤xi≤8.

posted by
**Stark** on
.

How many ordered tuples of 7 integers x1,x2,x3,x4,x5,x6,x7 are there, such that

x1+x2+x3+x4+x5+x6+x7−x1x2x3x4x5x6x7=6,

and 1≤xi≤8.