Помогите пжлст, уровнение 1)27,703-x=18,926 2)(312,45-0,00045)+x=518,13955-5,69

Question

Помогите пжлст, уровнение 1)27,703-x=18,926
2)(312,45-0,00045)+x=518,13955-5,69

Answer 1

27,703 - х = 18,926
х = 27,703 - 18,926
х = 8,777
==================
27,703  - 8,777 = 18,926
18,926=18,926

(312,45 -0,00045)+х = 518,13955 - 5,69
х= 518,13955 - 5,69 - (312,45 -0,00045)
х = 518,13955 - 5,69 - 312,45 + 0,00045
х = (518,13955 +0,00045)  - (312,45 + 5,69)
х = 518,14 - 318,14
х= 200
=================================
(312,45 -0,00045) + 200 = 518,13955  - 5,69
(312,45000  - 0,00045) + 200  = 518,13955 - 5,69000
312,44955 +200,00000 = 512,44955
512,44955= 512,44955