Question

Срочно!!!
$4 ^{x + 3} - 4 ^{x} = 63$
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Answer 1

$( {4}^{3} - 1) \times {4}^{x} = 63 \\ (64 - 1) \times {4}^{x} = 63 \\ 63 \times {4}^{x} = 63 \\ {4}^{x} = 1 \\ {4}^{x} = {4}^{0} \\ x = 0$