Problem 27 - Algebra 2

Question

Write each equation in standard form. Identify A, B, and C. \(4 x=8 y-12\)

Step-by-Step Solution

Answer

Standard form is \(4x - 8y = -12\) with \(A = 4\), \(B = -8\), \(C = -12\).

Step 1: Rearrange the equation

Start by moving all terms to one side of the equation to rewrite it in the form \(Ax + By = C\). Subtract \(8y\) from both sides:\[4x - 8y = -12\]

Step 2: Identify A, B, and C

The equation is now in the standard form \(Ax + By = C\) where:- \(A = 4\)- \(B = -8\)- \(C = -12\)

Key Concepts

Rearrange Equation

The process of rearranging an equation is crucial when transforming it into standard form. The standard form for a linear equation is denoted as \(Ax + By = C\), where \(A\), \(B\), and \(C\) are real numbers, and \(A\) and \(B\) are not both zero. To achieve this form, you must ensure all terms are situated on one side of the equation with the constant on the opposite side.

In our initial equation \(4x = 8y - 12\), the terms are split on both sides of the equation. To rearrange:

• Subtract \(8y\) from both sides to consolidate all variables on one side: \(4x - 8y = -12\).
• This step realigns the equation into its necessary format where all variables are on one side, neatly lining up with the destination form of \(Ax + By = C\).

Rearranging is all about organizing terms correctly to facilitate the identification of coefficients in the next step.

Identify Coefficients

Once the equation is properly rearranged into the standard form \(Ax + By = C\), identifying the coefficients becomes straightforward. Coefficients are the numerical factors that multiply the variables \(x\) and \(y\) within a function.

In the adjusted equation \(4x - 8y = -12\), we find:

• \(A = 4\): the coefficient of \(x\)
• \(B = -8\): the coefficient of \(y\)
• \(C = -12\): the constant term on the right-hand side of the equation

Identifying these coefficients allows us to fully understand the equation's structure. This step is crucial for analyzing linear equations further, as these coefficients determine the graph's slope and position.

When identifying coefficients, always ensure the order and signs of the terms are congruent with standard form.

Linear Equations

Linear equations represent a fundamental concept in mathematics, describing a relationship between two variables that create a straight line when graphed on a coordinate plane. The defining aspect of a linear equation is its highest exponent on any variable being one.

An equation structured as \(Ax + By = C\) is a classic linear equation. Here are some characteristics:

• It contains two variables typically denoted as \(x\) and \(y\).
• The equation forms a line when plotted on a graph, where each point represents a potential solution.

Working with linear equations involves understanding their various forms, primarily the slope-intercept form \(y = mx + c\) and the standard form \(Ax + By = C\). Transitioning between these forms entails knowing how to manipulate algebraically while preserving the equation's relationship.

Recognizing linear equations and their implications is essential in solving real-world problems, predicting future trends, and analyzing data within many scientific and business contexts.