algebra
posted by babs .
Snookers Lumber can convert logs into either lumber ofr lywood. In a given day, the mill turns out three times as many units of plywood as lumber. It makes a profit of $30 on a unit of lumber and $40 on a unit of plywood. How many of each unit must be produced and sold in order to make a profit of $15600?

x units of lumber.
3x units of plywood.
30x + 40*3x = $15,600,
150x = 15,600,
X = 104 Units of lumber.
3X = 312 Units of plywood.