Math Problem Statement

Solve the system of equations: -2x - 3y = -7 and y = 6x - 11.

Solution

The given system of equations is:

-2x - 3y = -7 \\ y = 6x - 11 \end{cases}$$ ### Step 1: Substitute $$y = 6x - 11$$ into the first equation. Substitute $$y = 6x - 11$$ into $$-2x - 3y = -7$$: $$-2x - 3(6x - 11) = -7$$ Expand and simplify: $$-2x - 18x + 33 = -7$$ Combine like terms: $$-20x + 33 = -7$$ Solve for $$x$$: $$-20x = -7 - 33$$ $$-20x = -40$$ $$x = 2$$ ### Step 2: Solve for $$y$$. Substitute $$x = 2$$ into $$y = 6x - 11$$: $$y = 6(2) - 11$$ $$y = 12 - 11$$ $$y = 1$$ ### Final Solution: The solution to the system of equations is: $$(x, y) = (2, 1)$$ Would you like me to provide a graph or verify the solution? ### Questions for Deeper Understanding: 1. What method was used to solve the system of equations? 2. Could elimination or graphing also solve this system effectively? 3. What happens if the equations were parallel (no solution)? 4. How do you check if $$(2, 1)$$ satisfies both equations? 5. How can systems of equations model real-world problems? ### Tip: Always substitute your solution back into the original equations to verify correctness.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Substitution Method
Solving Systems of Equations

Formulas

Substitution method
Linear equation: ax + by = c

Theorems

Substitution method theorem

Suitable Grade Level

Grades 8-10