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Step-5

Title: Substitute the varible value in the expression

Grade: 8-a Lesson: S2-L1

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 = -1, y = -4, z = 2 \$ x/y - y/z - z/x \$
2	Step	Now substitute x,y,z values in expression	\$ (\cancel(-)1)/(\cancel(-)4) - \cancel(-4)^2/\cancel2^1 - 2/(-1) \$
3	Step	After cancellation we get	\$ 1/4 + 2 + 2\$
4	Hint	Taking LCM as 4
5	Step	After simplification	\$ (1 + 8 + 8)/4 \$
6	Step	After adding we get	\$ 17/4\$
7		Answer	D

Step

Type

Explanation

Answer

Problem

Determine the value of an expression when x = -1, y = -4, z = 2
\$ x/y - y/z - z/x \$

Step

Now substitute x,y,z values in expression

\$ (\cancel(-)1)/(\cancel(-)4) - \cancel(-4)^2/\cancel2^1 - 2/(-1) \$

Step

After cancellation we get

\$ 1/4 + 2 + 2\$

Hint

Taking LCM as 4

Step

After simplification

\$ (1 + 8 + 8)/4 \$

Step

After adding we get

\$ 17/4\$

Answer