<PRE><B>Question 1205847</B>
&lt;br&gt;
1/2 of the chairs are arranged in long rows; 3/7 of them are arranged in short rows. The remainder are stacked in a corner.&lt;br&gt;
1/2 + 3/7 = 7/14 + 6/14 = 13/14&lt;br&gt;
(a) ANSWER: 1 - 13/14 = 1/14 of the chairs are stacked in the corner.&lt;br&gt;
Using the fractions 7/14 and 6/14 from the preceding calculation....&lt;br&gt;
let 7x = number of chairs in the 7 long rows
let 6x = number of chairs in the 18 short rows&lt;br&gt;
Then the number of chairs in each long row is 7x/7 = x
And the number of chairs in each short row is 6x/18 = x/3&lt;br&gt;
The number of chairs in each long row is 18 more than the number in each short row:&lt;br&gt;
x - (x/3) = 18
(2/3)x = 18
x = 18(3/2) = 27&lt;br&gt;
(b) ANSWER: the number of chairs in long rows is 7x = 7*27 = 189&lt;br&gt;
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