# urgent math

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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 -

• urgent math -

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 -

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 -

so... i just pick any number

• urgent math -

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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