Final answer:
The farmers produce 289.5 units of food, and the carpenters produce 723.75 units of housing.
Step-by-step explanation:
To solve the problem, we need to use the information provided and set up a system of equations. Let f, c, and t represent the units of food, housing, and clothing produced by the farmers, carpenters, and tailors respectively. We have the following equations:
f = 2c/3 + t/2
c = f/3 + h/3 + c/2
t = 91
t = 688
Substituting the values of c and t into the first equation, we get:
f = 2(688)/3 + 91/2
f = 1376/3 + 91/2
f = 916/3 + 91/2
f = 244 + 45.5
f = 289.5
Therefore, the farmers produce 289.5 units of food. To find the units of housing produced by the carpenters, we can substitute the value of f into the second equation:
h = (289.5)/3 + h/3 + (289.5)/2
h = 289.5/3 + 2h/3 + 144.75
h = 96.5 + 2h/3 + 144.75
h - 2h/3 = 96.5 + 144.75
h/3 = 241.25
h = 723.75
Therefore, the carpenters produce 723.75 units of housing.