Master Wang went to the furniture factory to buy a total of 19 tables and chairs, each table was 35

Can it be solved with equations?

If there are x tables, then the chairs are 19-x >>>More

There are x tables and 19-x chairs. It took a total of 35x+20 (19-x)=440. >>>More

Here's the idea:

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

Solution: Set x tables, 19-x chairs, 39x+20 (19-x)=456

39x+380-20x=456 >>>More

Assuming all chairs, value: $20 19 380.

Tables: (440-380) (40-20) 3 sheets. >>>More