Math Problem Statement

{x+6y=11 2x-12y=10

Solution

You have the system of equations:

  1. x+6y=11x + 6y = 11
  2. 2x12y=102x - 12y = 10

We can solve this system using the substitution or elimination method. Let's use the elimination method.

Step 1: Eliminate one variable

To eliminate one variable, we can manipulate the equations. Notice that the second equation 2x12y=102x - 12y = 10 has a term 2x2x, which is just 2 times the first equation's xx term.

We will multiply the first equation by 2:

2(x+6y)=2(11)2(x + 6y) = 2(11) 2x+12y=222x + 12y = 22

So, the system now looks like this:

  1. 2x+12y=222x + 12y = 22
  2. 2x12y=102x - 12y = 10

Step 2: Subtract the second equation from the first

Now, subtract the second equation from the first:

(2x+12y)(2x12y)=2210(2x + 12y) - (2x - 12y) = 22 - 10 2x2x+12y+12y=122x - 2x + 12y + 12y = 12 24y=1224y = 12

Step 3: Solve for yy

Divide both sides by 24:

y=1224=12y = \frac{12}{24} = \frac{1}{2}

Step 4: Substitute y=12y = \frac{1}{2} into one of the original equations

Now, substitute y=12y = \frac{1}{2} into the first equation:

x+6y=11x + 6y = 11 x+6(12)=11x + 6\left(\frac{1}{2}\right) = 11 x+3=11x + 3 = 11 x=113x = 11 - 3 x=8x = 8

Final Answer:

The solution to the system of equations is: x=8,y=12x = 8, \quad y = \frac{1}{2}

Would you like to see more details or ask any follow-up questions?

Here are some related questions:

  1. How would the solution change if the coefficients in the system were different?
  2. What would happen if we used substitution instead of elimination?
  3. How can we graphically represent this system of equations?
  4. What is the significance of the solution in terms of the lines' intersection on a graph?
  5. What are the steps to solve a system of three linear equations?

Tip: Always check your solution by substituting the values of xx and yy back into the original equations to verify that they satisfy both equations.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Systems of Equations
Elimination Method

Formulas

Ax + By = C (Standard form of a linear equation)
Elimination method: Adding or subtracting equations to eliminate a variable

Theorems

Fundamental theorem of linear equations
Properties of equality

Suitable Grade Level

Grades 8-10