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Step-4

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 k = - 6	\$ -7/3 + 4k - 2/(3k) \$
2	Step	Now substitute "k" value in expression	\$ -7/3 + 4(-6) - 2/(3(-6)) \$
3	Step	After multiplication we get	\$ -7/3 - 24 + \cancel2^1/\cancel18^9 \$
4	Step	After cancellation we get	\$ -7/3 - 24 + 1/9 \$
5	Step	Taking LCM as 9	\$ (-7 \times 3 - 24 \times 9 + 1 \times 1)/9 \$
6	Step	After multiplication we get	\$ (-21 - 216 + 1)/9 \$
7	Step	After adding we get	\$ (-237 + 1)/9 \$
8	Step	After adding	\$ - 236/9 \$
9		Answer	D

Step

Type

Explanation

Answer

Problem

Determine the value of an expression when k = - 6

\$ -7/3 + 4k - 2/(3k) \$

Step

Now substitute "k" value in expression

\$ -7/3 + 4(-6) - 2/(3(-6)) \$

Step

After multiplication we get

\$ -7/3 - 24 + \cancel2^1/\cancel18^9 \$

Step

After cancellation we get

\$ -7/3 - 24 + 1/9 \$

Step

Taking LCM as 9

\$ (-7 \times 3 - 24 \times 9 + 1 \times 1)/9 \$

Step

After multiplication we get

\$ (-21 - 216 + 1)/9 \$

Step

After adding we get

\$ (-237 + 1)/9 \$

Step

After adding

\$ - 236/9 \$

Answer