3/11 Warmup 5.2

When you replace "plug in" a value or expression for a variable it is called ______________

• Copy

• Paste

• Tag

• Substitution

How do you start solving the system?

• Box = Box

• 2x + 10 = -4x - 8

Which step would YOU do to start solving?

(all answers are correct)

• Add 4x

• subtract 2x

• subtract 10

• add 8

Continue Solving. What is your FINAL result for x = __?

• x = 3

• x = -3

• x = 12

• x = -24

x = -3; If you didn't get that, where did your mistake happen?

Write in the blank; "I ___________, but I fixed it"

If you need help finding your error, please raise your hand!

Now that you know x = -3, you must find y.

Because your answer should be a(n) ___________ ______

• Right ANSWER

• Ordered Pair ( x, y )

• easy one

• Reasonable Distraction

Now that you know x = -3, you must find y.

Choose which equation you plan to use.

• y = 2x + 10

• y = -4x - 10

• y = 2457345672453454

• y = -3x -10

What is the SOLUTION to the system?

• y = x

• ( i, dk)

• wherever the lines cross

• ( -3, 4)

Distribute: -5(-2x - 9)

• 10x - 45
• -10x - 45
• -10x + 45
• 10x + 45

In the example pictured here, can you see and describe how the student started to solve the system?

The first step is done correctly, what would YOU do next? See how far you can get!