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Literal Equations

Literal Equations. I can solve for a specific unknown variable. Find the Area of the given rectangle. What information do you need to find the area?. 10 ft. You need: The formula for area of a rectangle Identify the Length Identify the Width. 6 ft. A = LW. L = 6. W = 10.

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Literal Equations

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  1. Literal Equations I can solve for a specific unknown variable.

  2. Find the Area of the given rectangle. What information do you need to find the area? 10 ft • You need: • The formula for area of a rectangle • Identify the Length • Identify the Width 6 ft A = LW L = 6 W = 10 Now substitute what you know in to the formula. A = L W A = 6 W A = 6(10) A = 60 ft2

  3. Find the Length of the Given rectangle What information do you need to find the length? • You need: • The formula for area of a rectangle • Identify the Length • Identify the Width Unknown A = 91 ft2 7 ft A = LW L = unknown W = 7 Now substitute what you know in to the formula. 91= L7 91= L W A = L W 91= L W 7 7 91= L Reduce, if possible 13= L 7

  4. What do you do if you aren’t given any numbers, but you are still asked to solve for a specific variable? L Solve for W in this equation. • You need: • The formula for area of a rectangle • Identify the Length • Identify the Width W A A = LW Solve for W in this equation. L A = LW A = LW W L L Your science teacher will call this— “isolating the variable” A = W L

  5. Solve for x. 2(x -1) = -4 a(x -b) = c 2x – 2 = -4 ax – ab = c + 2 +2 + ab + ab 2x = -2 ax = c + ab a a 2 2 x = -1 x = c + ab a

  6. Solve for x. ( ( x + 5 = 7 (4) x + a = c ( )b b ( 4 ( b 4 x + 5 = 28 x + a = c b -a -a - 5 -5 x = 23 x = c b - a x = bc - a

  7. Solve for the indicated variable in parenthesis. y = 3x – 7 (x) y = 3x – 7 (x) + 7 + 7 y + 7 = 3x y + 7 = 3x 3 3 y + 7 = x 3

  8. Solve for the indicated variable in parenthesis. E = mc2 (m) E = mc2 c2 c2 E = m c2

  9. Solve for the indicated variable in parenthesis. 3x + 2y = 8 (y) 3x + 2y = 8 -3x -3x 2y = 8 – 3x 2 2

  10. Assignment • Literal Equations worksheet I can solve for a specific unknown variable.

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