opposite operations

Today in class we talked about Equation

Equation-mathematical statement with two expressions that have the same value

Example: x+2=3 y-7=(-4) 3a-2=a+2 b=4

Question:Can you model 8 times a number plus 4 is 12?

Answer: (8n+4=12)

5y-6=19

Find the:

variable

numerical coefficient

constant

Answer:

Variable: The variable is the Y

Numerical coefficient: The numerical coefficient is the 5

Constant: The constant is the 6

Question:How would you write this picture in a expression?

Answer: c+(-3)=(-6)

Opposite Operation

+,-

x,/

-,+

/,x

What is the letter a?

a+1=3

a+1-1=3-1

+1-1=zero pair 3-1+2

a=2

Sub:

a+1=3

2+1=3

3=3

Reverse order of operation:

4c-3=17

4c-3+3=17+3

4c/4 =20/4

C=5

Sub:

4c-3=17

4(5)-3=17

20-3=17

17=17

This is what we did in class to day

Here is a video to help