:10-(-8+5)=x-[1-3-(-7)
10- -3 = x-(-2 - (-7))
13=x-9
hay x-9=13
x=13+9
x=22
tick nhé
10 - ( -8 + 5 ) = x - [ 1 - 3 - ( - 7 ) ]
10 + 8 - 5 = x - 5
18 - 5 = x - 5
18 = x
=> x = 18
10-(-8+5)=x- [1-3-(-7)]
= 10-(-3)=x- [1-3-(-7)]
= 13=x- [1-3-(-7)]
= 13=x-[(-2-(-7)]
= 13=x-5
= x=5=13
=18
tick nhé bạn lúc nãi lộn
10-(-8+5)=x-[1-3-(-7)]
Suy ra 10--3=x-[1-3-(-7)]
Suy ra 10+3= x-5
Suy ra 13 = x -5
x = 5 +13 = 18
tick cho to