Abe and ben each have a certain number of dollars. if abe gives ben $5 then abe and ben will have the same number of dollars. if ben gives abe $5 then abe will have twice as many dollars as ben. let a=abe's original dollars b= bens original dollars. express the problem as a linear system in a and b. solve the system for a and b by addition or substitution. tell who had what and use dollar sign $.