Răspuns:
Explicație pas cu pas:
e) 0,1(6) - 2,75·x = 2 <=>
(16-1)/90 - 275·x/100⁽⁵ = 2 <=>
15/90⁽⁵ - 55·x/20⁽⁵ = 2 <=>
3/18⁽³ - 11·x/4 = 2 <=>
²⁾1/6 - ³⁾11·x/4 = ¹²⁾2 <=>
2 - 33·x = 24 => 33x = 2-24 <=>
33x = -22 I : 11 => 3x = -2 => x = -2/3 = - 0,(6)
f) 0,2(7) - 5,5·x = -4 <=>
(27-2)/90 - 5,5·x = -4 <=>
25/90⁽⁵ - 55·x/10⁽⁵ = -4 <=>
5/18 - ⁹⁾11·x/2 = ¹⁸⁾-4 <=>
5 - 99·x = -72 <=>
5+72 = 99x <=> 77 = 99x I:11 =>
9x = 7 => x = 7/9 = 0,(7)