Solving Equations with One Variable

​YOU NEED STAAR DESMOS, PAPER, AND PENCIL!

SOLVE EQUATIONS WITH VARIABLES ON BOTH SIDES OF THE EQUAL SIGN.

​

TODAY, I WILL

​LET'S START EASY

Solve:

30 + 2s = 16 + 3s

​you can always do it by hand!

​Want to Check Your Work?

​Step 1: Break Up the Equation into 2 separate parts.

Step 2: Change the variable to X, no matter what it is!

Step 3: Put both sides of your two new equations in Desmos with "y=" in front.

Step 4: Find exactly where those lines cross. The X value is your solution!

​Let's Try a Another

​Solve 8z - 9 = 15

​Try it by hand first!

Check Your Work

​Step 1: Break Up the Equation into 2 separate parts.

Step 2: Change the variable to X, no matter what it is!

Step 3: Put both sides of your two new equations in Desmos with "y=" in front.

Step 4: Find exactly where those lines cross. The X value is your solution!

Multiple Choice

Solve for x

3x + 8 = 2x - 7

• x=3

• x=-15

• x=15

• x=-3

Multiple Choice

Solve for b

12b + 5 = 7b - 8

• b=13/19

• b=-13/5

• b=-1/4

• b=-3/19

​Let's Try a Harder One!

​Solve:
-4+5(x+3)= 9

Oh No! Parentheses?

Check Your Work

​Step 1: Break Up the Equation into 2 separate parts.

Step 2: Change the variable to X, no matter what it is!

Step 3: Put both sides of your two new equations in Desmos with "y=" in front.

Step 4: Find exactly where those lines cross. The X value is your solution!

Multiple Choice

Solve:

9x + 22 = 3x

• -33

• -22/3

• 66

• -11/3