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Solving Two-Step Equations

Solving Two-Step Equations. *When you solve equations that have one operation, you use an inverse operation to isolate the variable. n + 7 = 15 -7 -7 n = 8. Solving Two-Step Equations. *You can also use inverse operations to solve equations that have more than one operation.

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Solving Two-Step Equations

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  1. Solving Two-Step Equations • *When you solve equations that have one operation, you use an inverse operation to isolate the variable. • n + 7 = 15 • -7 -7 • n = 8

  2. Solving Two-Step Equations *You can also use inverse operations to solve equations that have more than one operation. 2x + 3 = 23 -3 -3subtract 3 from both sides. 2x 20 2x= 20 2 2 divide each side by 2 x = 10

  3. Solving Two-Step EquationsMODEL DRAWING

  4. Solving Two-Step EquationsMODEL DRAWING If the entire box represents 23, what do the two x’ s represent?

  5. Solving Two-Step EquationsMODEL DRAWING If two x’ s are equal to 20, then what is one x equal to?

  6. Solving Two-Step EquationsMODEL DRAWING x = 10 Check: 2x + 3 = 23 2(10) + 3 = 23 20 + 3 = 23 23 = 23 Correct!

  7. Solving Two-Step EquationsMODEL DRAWING You try one! 3n + 7 = 31

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