Question

i
${2}^{x + 1?} + {2}^{x + 2?} = 48$

Answer 1

${2}^{x + 1} + {2}^{x + 2} = 48 \\ {2}^{x} ( {2}^{1} + {2}^{2} ) = 48 \\ {2}^{x} (6) = 48 \\ {2}^{x} = 8 \\ x = 3$
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