you are buying $20 woth of bird seed that consiss of two types of seed. Thistle seed attracts finches and cost $2 per pound. Dark oil sunflower seed attracts many kinds of song birds and cost $1,50 per pound. write and equation in standard form that represents the different amounts of $2 thistle seed "x" and $1,50 dark oil sunflower seed "y" that you could buy
