Answer:
y = 8
Explanation:
using the rules of logarithms
loga + logb = log(ab)
loga = logb , then a = b
given
log(5y - 4) = log(y + 1) + log4
log(5y - 4) = log4(y + 1) , then
5y - 4 = 4(y + 1) = 4y + 4 ( subtract 4y from both sides )
y - 4 = 4 ( add 4 to both sides )
y = 8