Question 4442
I'm sorry to note an error in the previous solution by pushpaharan:  

In question #3, you should ADD +7 to each side of the equation:


8=9x-7
8+7 = 9x -7 + 7
15 = 9x


Divide both sides by 9
{{{15/9 = 9x/9}}}


Reduce the fraction,

{{{x = 5/3}}}


R^2 at SCC