If log10 5 + log10 (5x + 1) = log10 (x + 5) + 1 = log10 (x + 5) + 1, then x equals:
A. 1
B. 3
C. 5
D. 10
Answer:B
If log10 5 + log10 (5x + 1) = log10 (x + 5) + 1 = log10 (x + 5) + 1, then x equals:
A. 1 B. 3 C. 5 D. 10