I can't imagine what it looks like.
I can't imagine what it looks like.
4. Add the two formulas to get B+C/2=P+A/2, D+A/2=P+C/2, and P=(B+D)/2.
I can't imagine what it looks like.
6. Suppose it's a day's work. Suppose there are X groups of workers producing tables and Y groups of workers producing chairs, then there are 2x groups of workers producing tables and 3y groups of workers producing chairs, 2x+3y = 28;; A group can produce 3 tables a day, 10 chairs and 4 chairs correspond to 1 table, so 3x*4= 10y. Available, x=5, y=6.