If adrien has x liters of milk left after one week, express x in terms of y

Question

it wants to know he linear equation for the question up above. Adrien has 4 liters of milk. He drinks y liters each day. If adrien has x liters of milk after one week, express x in terms of y.

Answer 1

Always remember to relate math to reality. Adrien began the week with 4 liters of milk, so the expression begins with it, too. He takes away Y liters every day (obviously subtraction), but he does it seven times, making 7Y. Combine the two and you get:

X = 4 - 7Y