Big Ideas Math: Modeling Real Life, Grade 6
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Big Ideas Math: Modeling Real Life, Grade 6 View details
2. Solving Equations Using Addition or Subtraction
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Exercise 1 Page 252

Substitute 9 into the given equation and then simplify.

No

Practice makes perfect
We can determine whether 9 is a solution by substituting it into the equation and simplifying using the order of operations.
a+6 = 17
9 + 6? =17
15 ≠ 17 *
Since both sides are not equal, 9 is not a solution.