Question

$3 ^{x - 1} \times 5 ^{2y - 3} = 225 \\ \\ it \: is \: of \: indices \: chapter$
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Answer 1

Answer:

x = 3 & y = 5/2

Step-by-step explanation:

${3}^{x - 1} \times {5}^{2y - 3} = {3}^{2} \times {5}^{2} \\ on \: comparing \: powers \\ x - 1 = 2 \\ so \: x = 3 \\ 2y - 3 = 2 \\ 2y = 5 \\ y = \frac{5}{2}$