Posted by **lori** on Sunday, October 2, 2011 at 12:14pm.

Sally and marta had the same number of postcards. After sally sold 18 of her postcards, marta had 4 times as many postcards as sally. How many postcards did each girl have to begin with?

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**Steve**, Monday, October 3, 2011 at 5:06am
s = m

(s-18)*4 = m

4s-72 = s

3s = 72

s = 24

they both started with 24

sally sold 18, leaving her with 6. marta then had 4 times that.

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**leia**, Tuesday, November 18, 2014 at 7:58pm
a box of chalk and 2 staplers cost ten dollars. three boxes of chalk and two staplers cost eighteen dollars. find the total of one box of chalk and one stappler

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**isyss**, Tuesday, March 10, 2015 at 4:47pm
$7

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