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Solving Addition and Subtraction Equations

Solving Addition and Subtraction Equations. Lesson 2-6. Procedure. Isolate the variable by performing the inverse operation on that variable. The inverse of subtraction is adding. The inverse of adding is subtracting.

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Solving Addition and Subtraction Equations

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  1. Solving Addition and Subtraction Equations Lesson 2-6

  2. Procedure • Isolate the variable by performing the inverse operation on that variable. • The inverse of subtraction is adding. The inverse of adding is subtracting. • Perform the same operation on the side of the equal sign that does not have a variable.

  3. We want to get the y by itself. Perform the inverse operation. The inverse of adding is subtracting. Example y + 13 = 25 - 13 - 13 Do the same operation on the other side of the equal sign. y = 12

  4. Check the answer in the original equation. y + 13 = 25 12 + 13 = 25 25 = 25

  5. Example 2 To get k by itself, we perform the inverse operation. The opposite of “minus 12” is “plus 12.” k – 12 = 4 + 12 + 12 k = 16

  6. Check k – 12 = 4 16 – 12 = 4 4 = 4

  7. Homework Time

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