we have
[tex] rx+h=sx-k [/tex]
Group terms that contain the same variable, and move the other terms to the opposite side of the equation
[tex] rx-sx=-k-h [/tex]
[tex] x(r-s)=-(k+h) [/tex] -----> divide by [tex] (r-s) [/tex] both sides
[tex] x=-\frac{(k+h)}{(r-s)} [/tex]
therefore
the answer is
[tex] x=-\frac{(k+h)}{(r-s)} [/tex]
