Math Problem Statement

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Solve the system of equations: 2x + 3y = 16 and 6x - 5y = 20.

Solution

You provided a system of equations:

2x + 3y &= 16 \\ 6x - 5y &= 20 \end{aligned}$$ ### Solving the system: We can solve this system using either substitution or elimination. Let's use the **elimination method** to eliminate one variable and solve for the other. 1. **Multiply the first equation by 3** to align the coefficients of $$x$$ in both equations: $$6x + 9y = 48$$ Now, the system is: $$\begin{aligned} 6x + 9y &= 48 \\ 6x - 5y &= 20 \end{aligned}$$ 2. **Subtract the second equation from the first**: $$(6x + 9y) - (6x - 5y) = 48 - 20$$ Simplifying: $$14y = 28$$ Therefore: $$y = \frac{28}{14} = 2$$ 3. **Substitute $$y = 2$$ into the first equation** to solve for $$x$$: $$2x + 3(2) = 16$$ Simplifying: $$2x + 6 = 16$$ $$2x = 10 \quad \Rightarrow \quad x = \frac{10}{2} = 5$$ ### Final solution: $$x = 5, \quad y = 2$$ Would you like any further details or explanation on the steps? --- Here are 5 related questions to deepen your understanding: 1. How would the solution change if one of the equations was nonlinear? 2. What other methods can be used to solve a system of equations? 3. Can a system of linear equations have no solution? Why? 4. How would you solve a system with three variables and three equations? 5. What is the graphical interpretation of solving two linear equations? **Tip:** When solving by elimination, ensure the coefficients of one variable are aligned before subtracting or adding equations.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Elimination Method

Formulas

ax + by = c (linear equations)
Elimination method: aligning coefficients and subtracting

Theorems

Fundamental Theorem of Algebra (linear systems)

Suitable Grade Level

Grades 8-10