Question

помогите пж,срочно нужно,не могу решить

Answer 1

$5,(4)\cdot x-1=0\\\\\star 5,(4)=A\; \; \to \; \; 10A=54,(4)\; \; ,\; \; 10A-A=54,(4)-5,(4)\; ,\\\\9A=49\; \; \to \; \; A=\frac{49}{9}\; \; ,\; \; 5,(4)=\frac{49}{9}\; \; \star \\\\\frac{49}{9}\cdot x-1=0\\\\\frac{49}{9}\cdot x=1\\\\x=\frac{9}{49}$

Answer 2

5,(4) · х - 1 = 0

5,(4) = 5 4/9 = 49/9

49х/9 - 1 = 0

49х/9 = 1

х = 1 : 49/9

х = 9/49