Math Problem Statement

4x + 2y = −6 and −6x + y = −4(x − 2)

Solution

Let's solve the system of equations:

Step 1: Simplify the equations

  1. The first equation is already in a simplified form: 4x+2y=64x + 2y = -6

  2. For the second equation, distribute 4-4 to simplify: 6x+y=4(x2)-6x + y = -4(x - 2) Expand: 6x+y=4x+8-6x + y = -4x + 8 Simplify: 6x+y+4x=8-6x + y + 4x = 8 2x+y=8-2x + y = 8

So, the system of equations becomes: 4x+2y=64x + 2y = -6 2x+y=8-2x + y = 8

Step 2: Solve the system

Multiply the second equation to align coefficients of yy:

Multiply the second equation by 22 to eliminate yy when added to the first equation: 4x+2y=64x + 2y = -6 4x+2y=16-4x + 2y = 16

Add the two equations:

(4x4x)+(2y+2y)=6+16(4x - 4x) + (2y + 2y) = -6 + 16 4y=104y = 10 y=104=52y = \frac{10}{4} = \frac{5}{2}

Substitute y=52y = \frac{5}{2} into one of the original equations:

Use the second simplified equation: 2x+y=8-2x + y = 8 Substitute y=52y = \frac{5}{2}: 2x+52=8-2x + \frac{5}{2} = 8 Simplify: 2x=852-2x = 8 - \frac{5}{2} 2x=16252-2x = \frac{16}{2} - \frac{5}{2} 2x=112-2x = \frac{11}{2} Solve for xx: x=114x = -\frac{11}{4}

Final Solution:

x=114,y=52x = -\frac{11}{4}, \quad y = \frac{5}{2}

Would you like a step-by-step explanation or a graph of this system?


Related Questions:

  1. How can you graphically verify the solution of a system of equations?
  2. What are some methods to solve systems of linear equations apart from substitution and elimination?
  3. How can you check if a system of equations has no solution or infinitely many solutions?
  4. How does multiplying an equation affect its solutions in a system?
  5. What are practical applications of solving linear systems?

Tip:

Always simplify equations fully before attempting to solve, as this can make the process much easier and reduce errors.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Systems of Linear Equations
Substitution Method
Elimination Method

Formulas

Equation of a line: ax + by = c
Distributive Property: a(b + c) = ab + ac
Simplification of linear equations

Theorems

Properties of Equality

Suitable Grade Level

Grades 9-12