Posted by **kari** on Sunday, September 20, 2009 at 3:49pm.

in a GIVEN DAY THE MILL TURNS OUT THREE TIMES AS MANY UNITS OF PLYWOOD. IT PROFITS OF $25 ON A UNIT OF LUMBER AND $40 ON A UNIT OF PLYWOOD. HOW MANY OF EACH M UST SELL TO MAKE PROFIT OF $14720 can anyone help im so confused

- urgent math -
**Reiny**, Sunday, September 20, 2009 at 3:52pm
read your first sentence, it is incomplete and makes no sense.

Please re-type your question, and please don't use all-caps.

- urgent math -
**kari**, Sunday, September 20, 2009 at 3:58pm
a normal working day the mill makes 3 times as many units of plywood as they do lumber.profit of lumber is $25 profit of plywood is $40 how many of each must be sold to obtain a profit of $14790

- urgent math -
**Reiny**, Sunday, September 20, 2009 at 4:11pm
let the number of lumber units be x

then the number of plywood units is 3x

then 25x + 40(3x) = 14790

solve for x

- urgent math -
**kari**, Sunday, September 20, 2009 at 4:14pm
so... i just pick any number

- urgent math -
**Reiny**, Sunday, September 20, 2009 at 4:24pm
no, you solve the equation

( why would you think to just pick any number ??)

25x + 40(3x) = 14790

25x + 120x = 14790

145x = 14790

divide by 145

x = 102

so they should make 102 units of lumber

and 3(102) or 306 units of plywood.

check 102(25) + 306(40) = 14790

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