Question

find the value of x
${3}^{x} + {3}^{x + 1 = 36}$

Answer 1

see the pic hope it is not wrong and helps you frnd

Answer 2

${3}^{x} + 3 \: ( {3}^{x} ) = 36 \\ 4( {3}^{x} ) = 36 \\ {3}^{x} = 9 \\ {3}^{x} = {3}^{2} \\ x = 2$
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