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Title: Absolute value of the negative variable

Grade: 8-a Lesson: S2-L6

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Solve the equation \$ \| -x \| = 81 \$
2	Formula:	By using formula	\$\| x \|\$ = a
3	Hint	By removing mod we get (+) (or) (-)	\$x = a (or) x = - a\$
4	Step	Here 'a' is 81	\$ -x = 81 (or) -x = -81 \$
5	Step	Multiplying "-" on both sides we get	\$-(-x) = - 81 (or) -(-x) = - (-81 )\$
6	Step	After multiplication we get	\$ x= - 81 (or) x = 81 \$
7		Answer	B

Step

Type

Explanation

Answer

Problem

Solve the equation
\$ | -x | = 81 \$

Formula:

By using formula

\$| x |\$ = a

Hint

By removing mod we get (+) (or) (-)

\$x = a (or) x = - a\$

Step

Here 'a' is 81

\$ -x = 81 (or) -x = -81 \$

Step

Multiplying "-" on both sides we get

\$-(-x) = - 81 (or) -(-x) = - (-81 )\$

Step

After multiplication we get

\$ x= - 81 (or) x = 81 \$

Answer