Math Problem Statement

solve each system by elimination

4x - 3y = -2 4x + 5y = 14

Solution

To solve the system of equations by elimination, we want to eliminate one variable. Here are the steps:

System of equations:

  1. 4x3y=24x - 3y = -2
  2. 4x+5y=144x + 5y = 14

Step 1: Eliminate xx

Both equations have the same 4x4x, so we can subtract one equation from the other to eliminate xx.

Subtract equation 1 from equation 2: (4x+5y)(4x3y)=14(2)(4x + 5y) - (4x - 3y) = 14 - (-2) 4x+5y4x+3y=14+24x + 5y - 4x + 3y = 14 + 2 8y=168y = 16

Step 2: Solve for yy

y=168=2y = \frac{16}{8} = 2

Step 3: Substitute y=2y = 2 into one of the original equations

Substitute y=2y = 2 into equation 1: 4x3(2)=24x - 3(2) = -2 4x6=24x - 6 = -2 4x=44x = 4 x=1x = 1

Solution:

The solution to the system is x=1x = 1 and y=2y = 2.

Would you like further details on any step or have any questions?

Here are 5 related questions:

  1. How do you solve a system using substitution instead of elimination?
  2. Can this system be solved graphically? What does the graph look like?
  3. What happens if both equations have the same coefficients for yy instead of xx?
  4. Can you explain how to check the solution by plugging the values into both equations?
  5. What are the possible outcomes when solving systems of equations (one solution, no solution, infinite solutions)?

Tip: Always simplify equations or expressions as much as possible before solving; it reduces the chance of errors!

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Math Problem Analysis

Mathematical Concepts

Algebra
Systems of Equations
Elimination Method

Formulas

Elimination Method for solving systems of linear equations

Theorems

Basic theorem of linear systems: A system of two linear equations can have one solution, no solution, or infinitely many solutions.

Suitable Grade Level

Grades 8-10