Question

Solve the equation: log5 9 + log5 (x + 8) = log5 31

Answer 1

Explanation:

Using the rules of logs

log5 (9) + log5(x+8) = log (9 *(x+8)) = log (9x+72) and this equals log5 (31)

so 9x+72 = 31

9x = -41

x = -41/9 = -4.555