The ratio of table and chair is how much the best furniture chair table height difference

Yes, there is a wide range of furniture: dining tables, dining chairs, sideboards, wine carts, wine cabinets, wardrobes, beds, bedside tables, chest of drawers, dressing tables, sofas, coffee tables, TV cabinets, flower stands, compartment cabinets, entrances, hall cabinets, shoe cabinets, newspaper shelves, bookcases, writing desks, flower stands, etc.

Here's the idea:

Set up to produce x tables, y chairs to maximize profits, equation 1: 4x+3y<=120 >>>More

A furniture market sells tables and chairs at 300 yuan and 60 yuan per unit, respectively. 1) Buy a table and get two chairs as a gift; (2) Payment based on the total price. A customer needs to buy 5 tables and a number of chairs (no less than 10), if the number of purchases is known to be x (sets) and the payment number is y (yuan), try to express y in the algebraic form of x respectively on the two preferential methods, and discuss which of the two methods is more cost-effective when the customer buys the same chair? >>>More

table; desk ;

chair >>>More

My pen is on the sofa.