12+ (23 -X )= 27 -(5-12)
12+ 23 -X = 27-5 +12
35 -X =34
X=35-34
X=1
12+(23-x)=27-(5-12)
12+(23-x)=34
23-x=22
x=1
Ta có : 12 + ( 23 - x ) = 27 - ( 5 - 12 )
12 + 23 - x = 27 - 5 + 12
35 - x = 22 + 12
35 - x = 34
x = 35 - 34
x = 1. Vậy x = 1
CHÚC BẠN HỌC TÔT !
a,12+(23-X)=27-(5-12)\(\Rightarrow12+\left(23-\chi\right)=27+7\)
\(\Rightarrow12+\left(23-\chi\right)=34\)
\(\Rightarrow23-\chi=34-12\)
\(\Rightarrow23-\chi=22\Rightarrow\chi=23-22\Rightarrow\chi=1\)
HTDT