Toán Lớp 7: Câu 1:
a. |9-7x|=5x-3
b. 8x-|4x+1|=x+2
c.|17x-5|-|17x+5|=0
d.|3x+4|=2.|2x-9|
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Toán Lớp 7: Câu 1:
a. |9-7x|=5x-3
b. 8x-|4x+1|=x+2
c.|17x-5|-|17x+5|=0
d.|3x+4|=2.|2x-9|
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