Math Problem Statement

Solve the system of equations: y = -3x - 2 and x - 3y = -4

Solution

The system of equations from the image is:

1) y=3x21) \ y = -3x - 2 2) x3y=42) \ x - 3y = -4

We can solve this system of equations using substitution or elimination. Let's proceed with substitution since the first equation is already solved for yy.

Step 1: Substitute the expression for yy from equation (1) into equation (2):

x3(3x2)=4x - 3(-3x - 2) = -4 Now, simplify the equation: x+9x+6=4x + 9x + 6 = -4 10x+6=410x + 6 = -4 Subtract 6 from both sides: 10x=1010x = -10 Divide by 10: x=1x = -1

Step 2: Substitute x=1x = -1 back into equation (1) to find yy:

y=3(1)2y = -3(-1) - 2 y=32y = 3 - 2 y=1y = 1

Final Solution:

x=1, y=1x = -1, \ y = 1

Would you like further details on the steps? Here are 5 related questions for practice:

  1. How would you solve the system using the elimination method instead?
  2. What does the solution represent geometrically for the two equations?
  3. How can you verify the solution by substituting x=1x = -1 and y=1y = 1 into both original equations?
  4. Can you rewrite both equations in standard form and identify their slopes and intercepts?
  5. How would the system change if the second equation had a different constant term?

Tip: Always check your solution by substituting it back into the original system of equations.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Systems of Equations
Substitution Method

Formulas

Linear equation: y = mx + b
Substitution method: Replacing variables in one equation with values or expressions from another equation

Theorems

Substitution method in solving systems of equations

Suitable Grade Level

Grades 8-10