Question 877841
Since they're both equal to y set them equal to each other and solve for x.
{{{9x+9=4x-9}}}
{{{5x=-18}}
{{{x=-18/5}}}
Then use either equation to solve for {{{y}}}
{{{y=9(-18/5)+45/5}}}
{{{y=-162/5+45/5}}}
{{{y=-117/5}}}