Big Ideas Math: Modeling Real Life, Grade 6
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2. Solving Equations Using Addition or Subtraction
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Exercise 22 Page 256

Substitute 79 into the given equation and then simplify.

Yes

Practice makes perfect
We can determine whether 79 is a solution by substituting it into the equation and simplifying using the order of operations.
s - 68 = 11
79 - 68 ? = 11
11=11 âś“
Since both sides are equal, 79 is a solution.