Question

please answer me fast it's important..both the questions​

Answer 1

Answer:

${( \frac{4}{5} )}^{9 - y} \div {( \frac{4}{5} )}^{2y} = {( \frac{4}{5} )}^{4y - 5} \\ \\ {( \frac{4}{5} )}^{9 - y} \times {( \frac{4}{5} )}^{ - 2y} = {( \frac{4}{5} )}^{4y - 5} \\ \\ ( \frac{4}{5} ) {}^{9 - y - 2y} = {( \frac{4}{5} )}^{4y - 5} \\ \\ ( \frac{4}{5} ) {}^{9 - 3y} = {( \frac{4}{5} )}^{4y - 5} \\ \\ 9 - 3y = 4y - 5 \\ \\ - 3y - 4y = - 5 - 9 \\ \\ - 7y = - 14 \\ \\ 7y = 14 \\ \\ y = \frac{14}{7} \\ \\ y = 2$

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