Question 1119437
x, price  of CD
y, price of  of DVD


{{{system(3x+2y=43,2x+3y=47)}}}


{{{5x+5y=90}}}


{{{x+y=18}}}--------one additional equation to use.  Use in the form of {{{2x+2y=36}}}; and use in the form of {{{3x+3y=54}}}.