1 / 12

Solving Equations by Adding and Subtracting

Solving Equations by Adding and Subtracting. Think of an equation as a balance scale. When you solve an equation, your goal is to isolate the variable. Golden Rule of Equations. What you do to one side of an equation, you must do to the other side to keep it the equation balanced.

von
Télécharger la présentation

Solving Equations by Adding and Subtracting

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Solving Equations by Adding and Subtracting Think of an equation as a balance scale. When you solve an equation, your goal is to isolate the variable.

  2. Golden Rule of Equations What you do to one side of an equation, you must do to the other side to keep it the equation balanced. ADDITION and SUBTRACTION “balance” each other MULTIPLICATION and DIVISION “balance” each other

  3. Addition Property of Equality You can Add the same number to each side of an equation without changing the value. Y - 5 = 13 Y - 5+(5)= 13+ 5 Y = 18

  4. Subtraction Property of Equality You can SUBTRACT the same number from each side of an equation without changing the value. Y + 5 = 13 Y + 5-(5)= 13- 5 Y = 8

  5. Examples • t – 58 = 71 2. x – 6 = -55 3. 114 + m = 249 4. x – 34 = -46

  6. Examples Cont. 5. x + x = 64 6. x – x = 64 7. The sale price of a camera is $119. This is $35 less than the original price. What was the original price?

  7. Division Property of Equality = 3x 18

  8. Examples 1. 5b = -235 2. -7h = 35 • d/4 = 7

  9. Remember: Whatever you do to one side of an equation, you must do to the other! Be careful: you cannot divide by zero: Division by ZERO is UNDEFINED

More Related