Solving equations

What are the two basic rules for solving algebraic equations?

• Whatever you do to one side of the equal sign, you must copy and do on the other side of the equal sign

• Negative signs can be ignored

• Always start on the left side, regardless of where the variable is

• Always do the opposite operation

True or False?

The solution to the equation 4y - 9 = -36 is y = -4.

• True

• False

4 + b = 30

• -34
• 34
• -26
• 26

Solve: 3w = 30

• 6

• 9

• 10

• 12

Solve for b:
-11 + 3(b + 5) = 7

• b = 1
• b = -1
• b = 3
• b = -3

4.5w = 22.5

• w = 101.25

• w = 3

• w = 5

• w = 18

What is a Variable?

• A letter with an unknown value or amount.

• The sound I make when solving algebra.

• The answer in an algebraic expression

What operation would you use to solve the following equation?

9x = 153

• addition

• subtraction

• multiplication

• division

Solve the equation: 3x - 7 = 32

• x = 13

• x = 12

• x = -13

• x = -12

12x = 144

• x = 12
• x = 4
• x = 2
• x = 132