Question

2
${2}^{x } + {2}^{3x} = 16 value \: ofx$
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Answer 1

here is your answer

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Answer 2

${\underline{\underline{\huge{\mathfrak{\green{Answer:-}}}}}}$

Hey Mate!!

${2}^{x} + {2}^{3x} = 16 \\ = > {2}^{x} + {2}^{3x} = {2}^{4}$

When bases are same powers are equal.

$x + 3x = 4 \\ = > 4x = 4 \\ = > x = 4 \div 4 \\ = > x = 1$