Toán Lớp 7: rút gọn: 2x+5y-8=7x
2x+5y-8=7x+2
12X-3.(4x+2y)=0
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Toán Lớp 7: rút gọn: 2x+5y-8=7x
2x+5y-8=7x+2
12X-3.(4x+2y)=0
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