Question

Cine stie sa le rezolve?este urgent​

Answer 1

$2) \: \: \: 5 {}^{2x - 7} = 125$

$5 {}^{2x - 7} = 5 {}^{3}$

$2x - 7 = 3$

$2x = 3 + 7$

$2x = 10$

$x = 5$

$3) \: \: 10 {}^{x} = 100000$

$10 {}^{x} = 10 {}^{4}$

$x = 4$

$7) \: \: \: \sqrt{x - 1} = 3$

$x - 1 = 9$

$x = 9 + 1$

$x = 10$

$8) \: \: \: \sqrt{2x} = 8$

$2x = 64$

$\sqrt{2 \times 32} = 8$

$8 = 8$

$x = 32$