Adler and Erika solved the same equation using the calculations below. Adler’s Work
Erika’s Work
StartFraction 13 over 8 EndFraction = k + one-half. StartFraction 13 over 8 EndFraction minus one-half = k + one-half minus one-half. StartFraction 9 over 8 EndFraction = k.
StartFraction 13 over 8 EndFraction = k + one-half. StartFraction 13 over 8 EndFraction + (negative one-half) = k + one-half + (negative one-half). StartFraction 9 over 8 EndFraction = k.

Which statement is true about their work?
Neither student solved for k correctly because K = 2 and StartFraction 1 over 8 EndFraction.
Only Adler solved for k correctly because the inverse of addition is subtraction.
Only Erika solved for k correctly because the opposite of One-half is Negative one-half.
Both Adler and Erika solved for k correctly because either the addition property of equality or the subtraction property of equality can be used to solve for k.