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Tarkime, kad duonos paklausos lygtis mažoje kepykloje yra Qd = 60 - 10Pb + 3Y, kur Qd yra duonos paklausos kiekis kepalais, Pb - duonos kaina doleriais už kepalą, o Y - vidutinės miesto pajamos tūkstančiais dolerių. 

Taip pat tarkime, kad duonos pasiūlos lygtis yra Qs = 30 + 20Pb - 30 Pf, kur Qs - yra pasiūla, o Pf - miltų kaina doleriais už svarą. 

Galiausiai darykime prielaidą, kad rinkos yra pusiausvyroje, todėl Qd = Qs.

Jei Y yra 10, o Pf yra 1 USD, apskaičiuokite, kokio dydžio yra pusiausvyros Q ir Pb .

Assume that the equation for demand for bread at a small bakery is Qd = 60 – 10Pb + 3Y, where Qd is the quantity of bread demanded in loaves, Pb is the price of bread in dollars per loaf, and Y is the average income in the town in thousands of dollars. Assume also that the equation for supply of bread is Qs = 30 + 20Pb – 30 Pf, where Qs is the quantity supplied and Pf is the price of flour in dollars per pound. Assume finally that markets clear, so that Qd = Qs.

 

If Y is 10 and Pf is $1, solve mathematically for equilibrium Q and Pb.

 

Q,  

pb

 

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