Question 877084
What you want to express is this:

(y-1)/(x+3)=-3/4.



The spaces as you seem to use are not working right for you.  With the expression in pure text as I showed, put triple left curly braces and triple right curly bracess, each looking like { and }.


The equation will then look like:
{{{(y-1)/(x+3)=-3/2}}};
The braces make the site render into mathematical notation.


The equation when simplified will become a linear equation.  Multiply both members by 4(x+3).  This will immediately give
{{{4(y-1)=-3(x+3)}}}, combined steps which you hopefully understand;
{{{4y-4=-3x-9}}}
{{{4y=-3x-5}}}
{{{highlight(y=-(3/4)x-5/4)}}}
You do not solve that; you obtain a linear equation in two variables.  This is shown in slope-intercept form, but you can adjust it into whichever form you want or need.