Six pounds of apple, the total cost is going to be six pounds times A dollars per pound and the total cost of banas is going to be well we bought three poiund of bananas. and the cost per pound is b and so the total cost of apples and bananas this scenario is going to be = to 15 is going to be = to $15 so let's think about how we might want to solve it we could use elimination we could use substitution whatever we want, we might do it graphically