Đáp án:
Lời giải: 12x (3-4x)+7 (4x-3)=0
36x-48x+28x-21=0
16x-21 =0
16x =21
x= 21/16
Lời giải: 12x(3-4x)-7(3-4x)=0
(=) (3-4x)(12-7)=0
(=) 3-4x=0
(=) x=3/4
Choose the best answer.
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Please turn off ___ lights when you leave ___ room.
I like _____ colorful costumes of ____ ethnic minority people in Vietnam.