Math Problem Statement

solve the equation by elimination type the ordered pair with no spaces -2x-6y=-8 and -x+6y=-22

Solution

To solve the system of equations using the elimination method, we start with:

2x6y=8(Equation 1)-2x - 6y = -8 \quad \text{(Equation 1)} x+6y=22(Equation 2)-x + 6y = -22 \quad \text{(Equation 2)}

Step 1: Add the equations

We observe that the 6y6y terms in both equations have opposite signs, so adding the two equations will eliminate the yy term:

(2x6y)+(x+6y)=(8)+(22)(-2x - 6y) + (-x + 6y) = (-8) + (-22)

This simplifies to:

3x=30-3x = -30

Step 2: Solve for xx

To find xx, divide both sides by 3-3:

x=303=10x = \frac{-30}{-3} = 10

Step 3: Substitute x=10x = 10 into one of the original equations

Now, substitute x=10x = 10 into Equation 2 to find yy:

x+6y=22-x + 6y = -22 (10)+6y=22-(10) + 6y = -22 10+6y=22-10 + 6y = -22

Add 10 to both sides:

6y=126y = -12

Now, solve for yy by dividing by 6:

y=126=2y = \frac{-12}{6} = -2

Step 4: Write the solution as an ordered pair

The solution is x=10x = 10 and y=2y = -2. Thus, the ordered pair is:

(10,2)(10,-2)

Would you like more details or have any questions?

Here are 5 related questions for practice:

  1. How would you solve the system using substitution?
  2. What happens if both equations have the same slope?
  3. How can you graphically interpret the solution to this system?
  4. Can you write the same system of equations in matrix form?
  5. How do you verify the solution by plugging it back into both equations?

Tip: Always check your solutions by substituting them back into the original equations.

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Math Problem Analysis

Mathematical Concepts

Algebra
Systems of Linear Equations
Elimination Method

Formulas

Elimination method: Adding/Subtracting equations to eliminate variables

Theorems

Solution consistency theorem for linear systems

Suitable Grade Level

Grades 8-10