Question

tle="2^{x} + 2^{x - 2} + 2^{x} = 42" alt="2^{x} + 2^{x - 2} + 2^{x} = 42" align="absmiddle" class="latex-formula">
solve for x​

Answer 1

Step-by-step explanation:

$2^{x} + 2^{x - 2} + 2^{x} = 42$

$x + (x - 2) + x = 42$

$3x - 2 = 42$

${2}^{3x - 2} = 42$

x =3