Xx2+Xx3+Xx4+X=2130
Xx2+Xx3+Xx4+Xx1=2130
Xx(2+3+4+1) =2130
Xx10 =2130
X =2130:10
X =213
tk mk nha ^_^
Xx2 +Xx3+Xx4+Xx1=2130
Xx(2+3+4+1)=2130
Xx10=2130
x=2130:10
X=213
Xx(1+2+3+4)=2130
Xx10=2130
X=2130:10
X=213
Vậy X=213
Xx2+Xx3+Xx4+x=2130
=Xx(2+3+4)=2130
=Xx10=2130
= X=2130:10
= X=213
X x ( 2+3+4+1) = 2130
X x 10 = 2130
X = 2130 : 10
X =213
tk nhé