Determine what value(s) for the variable would make each algebraic equation a true number sentence.
�2 = 81 is true for .
6� = 3� + 2� + � is true for .
� + 74 = � − 74 is true for .

He letter p on the number line below represents the number . (use the hyphen for negative numbers and write answer as a decimal, such as –7.2) number line from negative 7 to positive 7 in increments of 0.5 is shown. only the whole numbers are labeled. a point labeled p is placed at the eleventh tick mark to the left of 0.