Toán Lớp 7: 5 – | 3 x -1 | = 3
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Toán Lớp 7: 5 – | 3 x -1 | = 3
Mình cảm ơn bạn đã làm ạ ! Thanks !
Comments ( 2 )
=>|3x-1|=5-3
=>|3x-1|=2
=>[(3x-1=2),(3x-1=-2):}
=>[(3x=2+1),(3x=-2+1):}
=>[(3x=3),(3x=-1):}
=>[(x=3:3),(x=-1:3):}
=>[(x=1),(x=-1/3):}
Vậy x\in{1;-1/3}