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Title: Simplify the expression using two variable values x,y

Grade: 7-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	Evaluate the expression when x = 1, y = 2: \$ y - 2xy + 9 - 3x - 4y \$
2	Step	Substitute x,y value in the expression	2 - 2(1)(2) + 9 - 3(1) - 4(2)
3	Step	After simplification	2 - 4 + 9 - 3 - 8
4	Step	After simplification	11 - 15
5	Step	After simplification	-4
6		Answer	C

Step

Type

Explanation

Answer

Problem

Evaluate the expression when x = 1, y = 2:
\$ y - 2xy + 9 - 3x - 4y \$

Step

Substitute x,y value in the expression

2 - 2(1)(2) + 9 - 3(1) - 4(2)

Step

After simplification

2 - 4 + 9 - 3 - 8

Step

After simplification

11 - 15

Step

After simplification

-4

Answer

Tutor: Questions

Seq	Type	Question
1	Problem	What did you learn from this problem?
2	Clue	What did you learn from the clues?
3	Hint	What did you learn from the Hints?
4	Step	What did you learn from the Steps?
5	Step	How can we improve the Steps?

Seq

Type

Question

Audio

Problem

What did you learn from this problem?

Clue

What did you learn from the clues?

Hint

What did you learn from the Hints?

Step

What did you learn from the Steps?

Step

How can we improve the Steps?