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We will use the properties of the logarithm to solve the equation.
Let us see how we will use the properties of logarithm to solve the equation.
It is given that, log4(y − 9) + log4(4) = log4(64).
We will use the formula log a + log b = log ab.
log4 [4 × (y - 9)] = log4(64)
4 × (y - 9) = 64
y - 9 = 16
y = 25