Math Problem Statement

2x - 4y =6, 3y = 9

Solution

We are given the following system of equations:

  1. 2x4y=62x - 4y = 6
  2. 3y=93y = 9

Step 1: Solve for yy

From the second equation:
3y=93y = 9 Divide both sides by 3: y=3y = 3

Step 2: Substitute y=3y = 3 into the first equation

2x4(3)=62x - 4(3) = 6 Simplify: 2x12=62x - 12 = 6

Step 3: Solve for xx

Add 12 to both sides: 2x=182x = 18 Divide by 2: x=9x = 9

Solution:

The solution to the system is: x=9,y=3x = 9, \quad y = 3


Would you like to see this graphically, or check using another method? Let me know!

5 Follow-up Questions:

  1. How do you solve systems of equations using substitution and elimination methods?
  2. What are the graphical interpretations of linear systems like this one?
  3. How can we determine if a system of equations has no solution or infinitely many solutions?
  4. Can this system be written in matrix form and solved using row reduction?
  5. What are real-life applications of solving systems of linear equations?

Tip:

Always check your solutions by plugging them back into the original equations!

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Math Problem Analysis

Mathematical Concepts

Algebra
Systems of Linear Equations
Substitution Method

Formulas

Substitution method
Solving linear equations

Theorems

Linear equations theorem

Suitable Grade Level

Grades 7-9