Math Problem Statement

3x+10y=-2 -7x-10y=18

Solution

We can solve the given system of linear equations using the elimination method:

The system is:

  1. 3x+10y=23x + 10y = -2
  2. 7x10y=18-7x - 10y = 18

Step 1: Add the two equations

(3x+10y)+(7x10y)=2+18(3x + 10y) + (-7x - 10y) = -2 + 18

Simplify: 4x=16-4x = 16

Step 2: Solve for xx

x=164=4x = \frac{16}{-4} = -4

Step 3: Substitute x=4x = -4 into one of the original equations

Using 3x+10y=23x + 10y = -2: 3(4)+10y=23(-4) + 10y = -2

Simplify: 12+10y=2-12 + 10y = -2

Solve for yy: 10y=2+1210y = -2 + 12 10y=1010y = 10 y=1y = 1

Solution:

x=4,  y=1x = -4, \; y = 1

Would you like further explanations or verification of this solution?


Related Questions:

  1. What is the substitution method for solving systems of equations?
  2. How can we verify the solution of a system of equations?
  3. What happens if a system of equations has no solution or infinitely many solutions?
  4. How does the elimination method work for systems with three variables?
  5. What are practical applications of solving linear systems in real life?

Tip:

Always double-check your solution by substituting the values back into both original equations.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Systems of Equations

Formulas

Elimination method: Combine equations to eliminate a variable
Substitution: Substitute the solved variable back into an equation

Theorems

Basic principles of solving linear systems

Suitable Grade Level

Grades 8-10