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Use a property of equality to solve each equation. Then check the result. See Example 6$$-\frac{4 a}{5}=\frac{11}{15}$$
$a=(-11 / 12)$
Precalculus
Algebra
Chapter 2
Equations, Inequalities, and Problem Solving
Section 1
Solving Equations Using Properties of Equality
Algebra Topics That are Reviewed at the Start of the Semester
Equations and Inequalities
Missouri State University
Campbell University
Oregon State University
Idaho State University
Lectures
01:32
In mathematics, the absolu…
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00:36
Use a property of equality…
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solve the equation and check your solution. Negative for a divided by five is equal to 11 15th. Note that negative for a divided by five is the same thing as negative. 4/5 times, eh? Now we can isolate the variable by multiplying both sides of the equation. By the reciprocal of negative 4/5 the reciprocal of negative for Fitz is negative. 5/4 11 15th Time's negative 5/4 Let's use a multiplication shortcut to simplify the product. Five and 15 are both divisible by five. Five. Divided by five is 1 15 Divided by five is three. Be sure not to lose that negative. A is equal to 11 times negative. One Negative 11 Divided by three times for 12 A equals negative 11 12. To check the solution, let's substitute negative 11 12 into the original equation for a and see if it's a true statement. Negative lips Negative. 4/5 times negative. 11 12 Is that equal to 11 15th? Let's use a multiplication shortcut to simplify the product. Four and 12 are both divisible by 44 Divided by four is 1 12 Divided by four is three again. Don't lose that negative negative. One times negative 11 is positive. 11 divided by five times three is 15 11. 15 is equal to 11 15th a equals negative 11 12.
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