Question

Find x from the following:
${9}^{x + 2 } = 240 + {9}^{x}$
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Answer 1

Answer:

0 is o for o.1 and 1 is 1 for x

Answer 2

Step-by-step explanation:

${9}^{x + 2} - {9}^{x} = 240 \\ {9}^{x} \times {9}^{2} - {9}^{x} = 240 \\ {9}^{x}(81 - 1) = 240 \\{9}^{x} \times 80 = 240 \\ {9}^{x} = 3 \\ {3}^{2x} = 3 \\ 2x = 1 \\ x = 1 \div 2 \\ x = 0.5$