Algebra I: 1001 Practice Problems For Dummies (+ Free Online Practice). Mary Jane Sterling
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Название: Algebra I: 1001 Practice Problems For Dummies (+ Free Online Practice)

Автор: Mary Jane Sterling

Издательство: John Wiley & Sons Limited

Жанр: Математика

Серия:

isbn: 9781119883494

isbn:

СКАЧАТЬ href="#fb3_img_img_6d6a9494-4bce-5ef6-b961-b4004282bca6.png" alt="math"/>

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      Solving Linear Equations

      Linear equations are of the form math, where x is some variable, and a, b, and c are real numbers. To solve a linear equation, you perform a series of opposites: If a number is added to the term containing x, you subtract that number from both sides of the equation; if a number is subtracted from the term containing the variable, you add; if a number multiplies the variable, you divide; and if a number divides the variable, you multiply. Just be sure that whatever you do to one side of the equation, you also do to the other side. Think of the equation as two expressions pivoting on either side of a balance scale — you need to keep the sides evenly balanced.

      Here are a few things you do in this chapter to find answers:

       Using the addition property to solve linear equations

       Using multiplication and division — inverses of one another — to solve linear equations

       Combining operations — doing more than one operation for a solution

       Rewriting equations by eliminating grouping symbols

       Getting rid of fractions and fractional expressions before solving linear equations

      As you get in a groove solving linear equations, be sure you’re doing the following:

       Performing the same operation on each side of the equation to keep it balanced

       Being careful to use the inverse/opposite number when adding and subtracting

       Never multiplying or dividing by 0

       Distributing correctly to remove grouping symbols, especially with negative numbers

      566–583 Solve the linear equations for the value of the variable.

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      584–605 Solve for the value of the variable by eliminating the fraction.

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