Question

what is the root of 7p -9=16​

Answer 1

Answer:

$\sqrt{7p - 9 = \sqrt{16} } \\ \sqrt{7p - 3 = 4} \\ \sqrt{7p = 4 + 3} \\ \sqrt{7p = 7} \\ square \: on \: both \: sides \\ \sqrt{(7p {)}^{2} = 7 {}^{2} } \\ 7p {}^{2} = 49 \\ p { }^{2} = 49 \div 7 \\ p {}^{2} = 7 \\ p = \sqrt{7 } \\ hope \: its \: helps$