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Step-5

Title: Substitue the different variable values in the expressions using fractions

Grade: 6-a Lesson: S2-L8

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

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Determine the value of an expression when x = 4	\$ -8/3 - 2x - 1/x \$
2	Step	Now substitute "x" value in expression	\$ -8/3 - 2(4) - 1/4 \$
3	Step	After multiplication we get	\$ -8/3 - 8 - 1/4 \$
4	Step	Taking LCM as 12	\$ (-8 \times 4 - 8 \times 12 - 1 \times 3)/12 \$
5	Step	After multiplication we get	\$ (-32 - 96 - 3)/12 \$
6	Step	After adding we get	\$ -131/12 \$
7		Answer	A

Step

Type

Explanation

Answer

Problem

Determine the value of an expression when x = 4

\$ -8/3 - 2x - 1/x \$

Step

Now substitute "x" value in expression

\$ -8/3 - 2(4) - 1/4 \$

Step

After multiplication we get

\$ -8/3 - 8 - 1/4 \$

Step

Taking LCM as 12

\$ (-8 \times 4 - 8 \times 12 - 1 \times 3)/12 \$

Step

After multiplication we get

\$ (-32 - 96 - 3)/12 \$

Step

After adding we get

\$ -131/12 \$

Answer