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Subtract Linear Expressions Section 5.7

Learn how to subtract linear expressions by identifying like terms and applying the Keep, Change, Change method. Practice with examples and word problems.

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Subtract Linear Expressions Section 5.7

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  1. Subtract Linear ExpressionsSection 5.7

  2. Subtract Linear Expressions • When subtracting linear expressions, subtract like terms. • What are like terms? • Use zero pairs if needed • Remember to Keep, Change, Change

  3. Examples • 1. (5x - 9) – (2x - 7) • 2. (6x - 10) – (2x - 8)

  4. Use the Additive Inverse to Subtract • When subtracting integers, add the opposite or the __________ inverse. • The same process is used when subtracting linear expressions

  5. Examples • 3. (4x - 3) – (2x + 7) • 4. (5x - 4) – (2x + 3)

  6. You Try • 5. (2x + 4) – (-x + 5) • 6. (6x + 9) – (7x - 1)

  7. Word Problem • 5. The number of runs scored by the home team at a baseball game is represented by (x + 7). The number of runs scored by the visiting team is represented by (3x - 7). Write an expression to find out how many more runs he home team scored than the visiting team. Then evaluate the expression if the value of x is 6.

  8. Essential Question • How can you use the additive inverse to help you subtract linear expressions? ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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