Question 72541
{{{x + y + z = 98}}}
{{{x + y - z = 2 }}}
add these
{{{2x + 2y = 100}}}
{{{x + y = 50}}}
also
{{{y = x + 4}}}
{{{x - y = -4}}}
{{{x + y = 50}}}
add these
{{{2x = 46}}}
{{{x = 23}}} answer
{{{y = x + 4}}}
{{{y = 23 + 4}}}
{{{y = 27}}} answer
{{{x + y + z = 98}}}
{{{23 + 27 + z = 98}}}
{{{50 + z = 98}}}
{{{z = 48}}} answer
check
{{{23 + 27 + 48 = 98}}}
{{{98 = 98}}}
OK
{{{x + y - z = 2 }}}
{{{23 + 27 - 48 = 2}}}
{{{2 = 2}}}
OK