Math Problem Statement

Which system of equations has the same solution as the system below? 4x + 4y = -44 2x + 2y = -22

Solution

Let's analyze the question and solve it.

The given system of equations is:

4x+4y=444x + 4y = -44 2x+2y=222x + 2y = -22

Step 1: Simplify the equations if possible

The second equation, 2x+2y=222x + 2y = -22, can be rewritten by dividing through by 2: x+y=11x + y = -11

For the first equation, 4x+4y=444x + 4y = -44, divide through by 4: x+y=11x + y = -11

Thus, both equations reduce to x+y=11x + y = -11, meaning they are equivalent.

Step 2: Check which system has the same solution

To determine which option has the same solution as the original system, let’s verify the given choices.

  1. Option 1: 4x+4y=44,2x4y=444x + 4y = -44, \quad 2x - 4y = 44 Solve these equations:

    • First equation: 4x+4y=444x + 4y = -44 simplifies to x+y=11x + y = -11.
    • Second equation does not match this simplification.

    Not correct.

  2. Option 2: 4x+4y=44,4x+4y=444x + 4y = -44, \quad -4x + 4y = 44 Adding these equations eliminates xx and yy does not match.

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Math Problem Analysis

Mathematical Concepts

Systems of Equations
Linear Equations
Simplification

Formulas

Ax + By = C (Standard form of a linear equation)

Theorems

Consistency and Equivalence of Linear Systems

Suitable Grade Level

Grades 8-10