Math Problem Statement

Solve the following system of equations: 6x + 5y = -5 and 3x + 5y = 10

Solution

The problem asks to solve the given system of equations:

6x+5y=56x + 5y = -5 3x+5y=103x + 5y = 10

Step 1: Subtract the equations to eliminate yy:

Subtract the second equation from the first: (6x+5y)(3x+5y)=510(6x + 5y) - (3x + 5y) = -5 - 10 Simplify: 6x3x+5y5y=156x - 3x + 5y - 5y = -15 3x=153x = -15

Step 2: Solve for xx:

x=153=5x = \frac{-15}{3} = -5

Step 3: Substitute x=5x = -5 into one of the original equations:

Using the second equation: 3x+5y=103x + 5y = 10 Substitute x=5x = -5: 3(5)+5y=103(-5) + 5y = 10 15+5y=10-15 + 5y = 10 5y=10+155y = 10 + 15 5y=255y = 25

Step 4: Solve for yy:

y=255=5y = \frac{25}{5} = 5

Final Solution:

x=5,y=5x = -5, \, y = 5

Would you like further details or explanations?

Related Questions:

  1. How can you graphically verify the solution of a system of equations?
  2. What are the methods for solving a system of equations other than elimination?
  3. How can substitution be used for the same system?
  4. What happens if the system of equations has no solution or infinitely many solutions?
  5. Can this system be solved using matrix operations or determinants?

Tip:

Always check your solution by substituting the values of xx and yy into both original equations to ensure they hold true!

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Math Problem Analysis

Mathematical Concepts

Systems of Equations
Elimination Method
Substitution Method

Formulas

Elimination method: Subtract equations to eliminate a variable
Substitution method: Solve for one variable and substitute

Theorems

Properties of Equality
Linear Equation Solution Techniques

Suitable Grade Level

Grades 8-10