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.Ask a new question for Free
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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
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