180 - 23x + 115 = 65
-23x = 65 - 115 - 180
-23x = -230
x=10
a) \(180-23\left(x-5\right)=65\)
\(23x-115=180-65\)
\(23x-115=115\)
\(23x=230\)
\(x=10\)
vay \(x=10\)
k mk nha ban
Giải:
a) 180 - 23 ( x - 5 ) = 65
23 ( x - 5 ) = 180 - 65 = 115
x - 5 = 115 : 23 = 5
x = 5 + 5 = 10
=> x = 10
Vậy x = 10
180-23(x-5)=65
(x-5)=180-65
(x-5)=115
x=115:23
x=5
23*[x -5]=180-65
23*[x-5]=115
x-5=115chia 23
x-5=5
x=10 chuc bn hoc tot bai nay hoi de hihi mk giai day du roi nha bn dung co thay my bn tren noi truoc mk nhung kg day du