In regard to dollars, Hannah makes 7 less than Christy. Together they make 20. What do Hannah and Christy make alone?
\(Christy = x\)
\(Hannah = (x - 6)\)
\(Hannah\,\,\&\,\,Christy = 20\)
\(x + (x - 6) = 20 \longrightarrow 2x - 6 = 20 \)
\(\longrightarrow 2x = 26 \rightarrow x = 13 \)
\(Christy = x = 13\)
\(Hannah = (x - 6) = ((13) - 6) = 7 \)
