Question

2X
20
Xt4
а a
a
Ela
a
х
了 & R
a​

Answer 1

$\frac{{a}^{2x} \times {a}^{x + 4} }{ {a}^{x + 2} } = {a}^{20} \\ \frac{{a}^{2x + x + 4} }{ {a}^{x + 2} } = {a}^{20} \\ \frac{ {a}^{3x + 4} }{ {a}^{x + 2} } = { a}^{20} \\ {a}^{3x + 4 - x - 2} = { a}^{20} \\ {a}^{2x + 2} = { a}^{20} \\ 2x + 2 = 20 \\ 2x = 18 \\ x = 9$