Solving Two Step Equations with One Variable

Solve: 23 = 5 + 3c

Mathematical Equivalence

ON

Solve: 14 = 3y - 4

Mathematical Equivalence

ON

Solve: -7x + 5 = 19

Mathematical Equivalence

ON

Solve: -15 = -4y + 5

Mathematical Equivalence

OFF

Solve the equation:
-5x = 25

• x = 20

• x = -20

• x = -5

• x = 5

x - 62 = 123
How should you show your work to isolate the variable and solve the equation?

• Add 62 to each side. 

• Subtract 62 from each side.

• Multiply each side by 62.

• Add 123 to each side.

x - 8 = -5 

• 13

• -13

• 3

• -3

How can you "convince" someone that your solution to an equation is correct?

• Tell them ... "Just trust me!"

• Substitute your solution for the variable and make sure that both sides of the equation are "balanced."

• Just keep showing them how to solve the equation.

What is the inverse operation needed to solve for p?
765 = p - 254

• subtraction

• addition

• multiplication

• division

Solve the following equation
2y = 18

• 36

• 16

• 9

• 20