Question

помогите решить уровнение

(R+5)*7-54=(R+5)*4

Answer 1

(R+5)*7-54=(R+5)*4,
(R+5)*7=(R+5)*4+54,
(R+5)*7 - (R+5)*4 = 54,
(7-4)*(R+5) = 54,
3(R+5) = 54,
R+5 = 18,
R = 18 - 5,
R = 13.

Answer 2

топ спосибо

Answer 3

спасибо

Answer 4

:)