Answer:
Step-by-step explanation:
a. table
x = 100,y = 20*100+3000 = 2000+3000 = 5000
x = 200,y = 20*200+3000 = 4000+3000 = 7000
x = 300,y = 20*300+3000 = 6000+3000 = 9000
b：
y = 4300
4300 = 20x+3000
20x = 4300-3000
20x = 1300
x = 1300/20
x = 65
so 65 computer desks can be produced.
2(7x-3)=9
14x-6=9
14x=9+6
14x=15
x=15/14
x = 5
12x - 6 + 6 = 54 + 6
12x = 60
12/12 = 60/12
X = 5
16.08
