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Step-3

Title: Substitute the varible value in the fractional expression

Grade: 8-a Lesson: S2-L3

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 u = -3, v = -7, w = 8 \$ (-u-2v-3w)/(3u) \$
2	Step	Now substitute u,v,w values in expression	\$ (-(-3)-2(-7)-3(8))/(3(-3)) \$
3	Step	After multiplication we get	\$ (3 + 14 - 24)/(-9) \$
4	Step	After adding we get	\$ (\cancel(-)7)/(\cancel(-)9) \$
5	Step	After cancellation we get	\$ 7/9 \$
6		Answer	B

Step

Type

Explanation

Answer

Problem

Determine the value of an expression when u = -3, v = -7, w = 8
\$ (-u-2v-3w)/(3u) \$

Step

Now substitute u,v,w values in expression

\$ (-(-3)-2(-7)-3(8))/(3(-3)) \$

Step

After multiplication we get

\$ (3 + 14 - 24)/(-9) \$

Step

After adding we get

\$ (\cancel(-)7)/(\cancel(-)9) \$

Step

After cancellation we get

\$ 7/9 \$

Answer