Question

СРОЧНО! 7*2^(x+1)+2^(x)-2^(x+1)=52

Answer 1

$7 \times {2}^{x + 1} + {2}^{x} - {2}^{x + 1} = 52 \\ 6 \times {2}^{x + 1} + {2}^{x} = 52 \\ {2}^{x} (12 + 1) = 4 \times 13 \\ 13 \times {2}^{x} = 13 \times {2}^{2} \\ x = 2$