Toán Lớp 7: a) (3x+1).(3y-3)= 5.3^z
b ) 5x+2y / 16 = 2y+3z / 21 = 3z+5x / 25 và x+y+z = 10
chon 1 trong 2 nhaaaaaaaaaaa day du nha
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Toán Lớp 7: a) (3x+1).(3y-3)= 5.3^z
b ) 5x+2y / 16 = 2y+3z / 21 = 3z+5x / 25 và x+y+z = 10
chon 1 trong 2 nhaaaaaaaaaaa day du nha
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