Chapter 4.1, Problem 64E

Repeat Problem 63 for the following systems:

$\begin{array}{l}\begin{array}{cc}\left(\text{A}\right)\text{ 6}x-5y=10& (\text{B})6x-5y=10\end{array}\\ \begin{array}{cc}-13+11y=-20& 11x+8y=4\end{array}\\ \left(\text{C}\right)6x-5y=10\\ -12x+10y=-20\end{array}$

bushels, and the annual demand is $2.0$ billion bushels. When the price increases to $\text{\$}5.10$ per bushel, the annual supply in-creases to $2.1$ billion bushels, and the annual demand decreases to $1.8$ billion bushels. Assume that the price-supply and price-demand equations are linear.

(A) Find the price-supply equation.

(B) Find the price-demand equation.

(C) Find the equilibrium price and quantity.

(D) Graph the two equations in the same coordinate system and identify the equilibrium point, supply curve, and demand curve.