document.write( "Question 435654: Softee Blankets charges $6 for shipping orders of $20 or less, $10 for orders from $20.01 to $70, and $15 for orders over $70. One week shipping charges for 540 orders totaled $5320. There were 50 more orders for $20 or less shipped than there were orders for over $70. Find the number of orders shipped at each rate.\r
\n" ); document.write( "\n" ); document.write( "So far I've got
\n" ); document.write( "x+y+z=31
\n" ); document.write( "50x-z=0
\n" ); document.write( "6x+10y+15z=?\r
\n" ); document.write( "\n" ); document.write( "I'm just having problems finding the third system. The result always comes out negative and you can't sell a negative amount of items so somewhere I messed up I just don't know where. \n" ); document.write( "

Algebra.Com's Answer #301521 by rwm(914) $\"\"$ $\"About$

You can put this solution on YOUR website!
Where did the 31 come from? Oh I see you added the dollar amounts of the charges.6,10,15-\r
\n" ); document.write( "\n" ); document.write( "Why are you multiplying 50 times x? It says 50 more not 50 times. Plus it is x that is more than z so you have to add to z to get it to equal x.\r
\n" ); document.write( "\n" ); document.write( "At least you tried.
\n" ); document.write( "Here you go.
\n" ); document.write( "x+y+z=540
\n" ); document.write( "x=z+50
\n" ); document.write( "6x+10y+15z=5320
\n" ); document.write( "Solve these equations to get your three values.
\n" ); document.write( "x=170
\n" ); document.write( "y=250
\n" ); document.write( "z=120 \n" ); document.write( "

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