Solve the System of Equations Using Substitution $$\left\{ \begin{array} { l } x y = 20 \\x + y = 9\end{array} \right.$$

question 81

Multiple Choice

Solve the system of equations using substitution.
- $$\left\{ \begin{array} { l } x y = 20 \\x + y = 9\end{array} \right.$$

• A) \(x = 6 , y = 3 ; x = 3 , y = 6\)
• B) \(x = 10 , y = 2 ; x = 2 , y = 10\)
• C) \(x = 5 , y = 4 ; x = 4 , y = 5\)
• D) \(x = 20 , y = 1 ; x = 1 , y = 20\)

Explain the impact of taxes on market equilibrium, price, and quantity.

Understand the concept of tax incidence and how the tax burden is distributed between buyers and sellers.

Evaluate the effects of subsidies and how they differ from price controls.

Comprehend how taxes affect supply and demand curves and market equilibrium.

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