Question 172963
{{{y-(-7)=(7/8)x-7/4}}} is spot on, and adding {{{-7}}} to both sides is exactly the right thing to do, so let's proceed:


{{{y-(-7)+(-7)=(7/8)x-7/4+(-7)}}}


And now we simplify:


{{{y=(7/8)x-7/4-7}}}, but {{{-7=-7/1}}} and {{{(-7/1)(4/4)=-28/4}}} so:


{{{y=(7/8)x-7/4-28/4}}}, but {{{-7/4-28/4=-35/4}}} so:


{{{y=(7/8)x-35/4}}}


And presuming your goal was to create an equation for the line in slope-intercept form, you are done.