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Textbook page 66 IAN page 87

Solving Subtraction Equations. Textbook page 66 IAN page 87. Solving subtraction Equations. Each side of the equation must be balanced. We balance an equation by doing the same thing to both sides of the equal sign. Solving subtraction Equations. Example 1.

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Textbook page 66 IAN page 87

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  1. Solving Subtraction Equations Textbook page 66 IAN page 87

  2. Solving subtraction Equations Each side of the equation must be balanced. We balance an equation by doing the same thing to both sides of the equal sign.

  3. Solving subtraction Equations Example 1 Solving Subtraction Equations (A) p – 2 = 5 Do the opposite Solve each equation. Check your answers. + 2 + 2 Do the same thing to both sides of the equation. p = 7 7 - 2 = 5 To check your work, substitute in the value of p.

  4. Solving subtraction Equations Example 1 Solving Subtraction Equations (B) 4 = x – 1.1 Do the opposite Solve each equation. Check your answers. Do the same thing to both sides of the equation. + 1.1 + 1.1 5.1 = x 4 = 5.1 – 1.1 To check your work, substitute in the value of x.

  5. Solving subtraction Equations Example 1 Solving Subtraction Equations (C) x – 5.6 = 1.9 Do the opposite Solve each equation. Check your answers. Do the same thing to both sides of the equation. + 5.6 + 5.6 x = 7.5 7.5 - 5.6 = 1.9 To check your work, substitute in the value of x.

  6. Solving subtraction Equations Example 2 Word Problem: Geography Mt. Rainier, in Washington, has a higher elevation than Mt. Shasta. The difference between their elevations is 248 feet. What is the elevation of Mt. Rainier? Write an equation and solve. 248 = r – 14,162 +14,162 +14,162 14,410 = r

  7. Solving subtraction EquationsPractice Problems 1. p - 8 = 9 2. 3 = x - 16 3.a – 1.3 = 1.8 4. 1.5 = y - 7 5.n - 24 = 9 6. 39 = d - 2 p = 17 x = 19 a = 3.1 y = 8.5 n = 33 d = 41

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