Math Problem Statement

y=-6x-7 4x-y=-3

Solution

To solve the system of linear equations:

  1. y=6x7y = -6x - 7
  2. 4xy=34x - y = -3

we can use either substitution or elimination. Let's use the substitution method since yy is already expressed in terms of xx in the first equation.

Step 1: Substitute yy in the Second Equation

Given y=6x7y = -6x - 7, substitute this value into the second equation:

4x(6x7)=34x - (-6x - 7) = -3

Simplify:

4x+6x+7=34x + 6x + 7 = -3

10x+7=310x + 7 = -3

Step 2: Solve for xx

Subtract 7 from both sides:

10x=3710x = -3 - 7

10x=1010x = -10

Divide by 10:

x=1x = -1

Step 3: Solve for yy

Substitute x=1x = -1 back into the first equation:

y=6(1)7y = -6(-1) - 7

y=67y = 6 - 7

y=1y = -1

Solution

The solution to the system of equations is:

x=1,y=1x = -1, \quad y = -1

Would you like more details on the steps, or do you have any questions?

Here are 5 related questions to consider:

  1. How can you solve a system of equations using the elimination method?
  2. What is the graphical interpretation of solving a system of linear equations?
  3. How do you solve systems of equations that are nonlinear?
  4. What are the conditions for a system of equations to have no solution or infinitely many solutions?
  5. How can matrices be used to solve systems of linear equations?

Tip: When dealing with systems of equations, always check your solution by substituting the values back into the original equations to verify they are correct.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Substitution Method

Formulas

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Theorems

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Suitable Grade Level

Grades 7-9