# math

posted by
**Anonymous**
.

Find the number of solutions to the equation

1/a+1/b+1/c+1/d=1

where a, b, c, d are positive integers and a≤b≤c≤d.

posted by
**Anonymous**
.

Find the number of solutions to the equation

1/a+1/b+1/c+1/d=1

where a, b, c, d are positive integers and a≤b≤c≤d.