Question

Class 7 maths. Pls solve fast. ​

Answer 1

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$9 \times {3}^{x + 2} = 729 \\ \\ 9 \times {3}^{x + 2} = {9}^{3} \\ \\ {3}^{2} \times {3}^{x + 2} = {3}^{6} \\ \\ {3}^{x + 2 + 2} = {3}^{6} \\ \\ {3}^{x - 4} = {3}^{6} \\ \\ x - 4 = 6 \\ \\ x = 6 + 4 \\ \\ x = 10$