oki chúc ngủ ngon

thì sẽ bị nghẹn đúng thì tick mik nhé

ko nek

(3x-8)=20-8

(3x-8)=12:3

x=4

vậy x =4

ko bt nx

=9 em nhe

=2-13

=11

em nhé!!!

yo lon bn nhe

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vd là nc ở đây sâu quá em nhé