Lumen OHM

When $\displaystyle {y}=-{6}$ ,

Evaluate $\displaystyle {y}+{9}$

Evaluate $\displaystyle -{y}+{9}$

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Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172
Enter DNE for Does Not Exist, oo for Infinity

Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172
Enter DNE for Does Not Exist, oo for Infinity