Algebra
posted by Nessie .
I do not have to solve the problemI need to make an equation or two that would HELP me be able to solve it.
Tommy's Lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as lumber. It makes a profit of $25 on a unit of lumber and $40 on a unit of plywood. How many units of each type must be produced and sold in order to make a profit of $10,920?
My teacher said I would probably need to make 2 equations, each with 2 variables. I do not know how to take the information to make an equation? Can anyone help me make 2 equations with this info?
Thanks so much!

let the number of units of lumber be x
let the number of units of plywood be y
your first equation is y = 2x or
2x  y = 0
form the second equation just like you did for the other questions. 
I would not use two variables here.
the part where it says, "the mill turns out twice as many units of plywood as lumber" tells me to define
pieces of lumber  x
pieces of plywood  2x
then 25x + 40(2x) = 10920
etc
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