Question 302030
Let {{{x}}} = number of graphing calculators bought
{{{49 - x}}} = number of scientific calculators bought
{{{8*(49 - x) + 55x = 1755}}}
{{{392 - 8x + 55x = 1755}}}
{{{47x = 1363}}}
{{{x = 29}}}
{{{49 - x = 20}}}
20 scientific and 29 graphing were bought
check:
{{{8*(49 - x) + 55x = 1755}}}
{{{8*(49 - 29) + 55*29 = 1755}}}
{{{160 + 1595 = 1755}}}
{{{1755 = 1755}}}
OK