Question

Solve for q
1/p + 1/q= -1/f
where p + q = 3 and f=5

Answer 1

We can solve for q by first substituting the value of p from the second equation into the first equation:
1/p + 1/q = -1/f
1/(3-q) + 1/q = -1/5

Next, we can cross-multiply and combine like terms:
5 + 5q = -3 + 3q
8q = -8
q = -1