Question

Помогите пожалуйста (

Answer 1

$1)\frac{4}{z} =20\\\\z=\frac{4}{20}=0,2\\\\\boxed{z=0,2}\\\\\\2)\frac{x-5}{x-3} =0\\\\x-5=0\\\\\boxed{x=5}\\\\\\3)\boxed{6x^{4}+14x^{2}+3=0}\\\\\\4)\frac{x-8}{x-6}=0\\\\x-8=0\\\\\boxed{x=8}$

$5)\frac{x+10}{x-74}\\\\x-74\neq0\\\\\boxed{x\neq74}$