a.2.(x-11)-40=38 b.2015+{2016.[9-(11-8)^2]+7}
=2.(x-11)=38+40 = 2015+{2016.[9-3^2]+7}
=2.(x-11)=78 =2015+{2016.[9-9]+7}
=x-11=78:2 =2015+{2016.0+7}
=x-11=39 =2015+{0+7}
=x=39+11 =2015+7
=x=50 =2022
Nhớ k cho mik nha ^^
a)2.(x-11)=38+40=78
x-11=78:2=39
x=39+11
x=50
b)2022
c)sai đề rồi bạn ơi