Question 965785
Multiply the first equation by {{{240}}},
{{{15x+16y=108}}}
Multiply the second equation by {{{540}}},
{{{27x-20y=48}}}
Multiply the first equation by 5 and the second equation by 4 and add them,
{{{75x+80y+108x-80y=540+192}}}
{{{183x=732}}}
{{{x=4}}}
Then use either equation to solve for {{{y}}}.
{{{60+16y=108}}}
{{{16y=48}}
{{{y=3}}}
(4,3)
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*[illustration da37.JPG].