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 19 Page 256

Substitute 15 into the given equation and then simplify.

No

Practice makes perfect
We can determine whether 15 is a solution by substituting it into the equation and simplifying using the order of operations.
19 - g = 7
19 - 15 ? = 7
4 ≠ 7 *
Since both sides are not equal, 15 is not a solution.