{ (a-14)*(b+10)-a*b=4, a+b=240 }
{ ab-14b+10a-140-ab=4, a+b=240 }
{ 10(a+b)-24b=144, a+b=240 }
{ 5*240 - 12 b = 144, a=240-b }
{ 5*20 - b = 12, a=240-b }
{b=112, a=128}
{ (a-14)*(b+10)-a*b=4, a+b=240 }
{ ab-14b+10a-140-ab=4, a+b=240 }
{ 10(a+b)-24b=144, a+b=240 }
{ 5*240 - 12 b = 144, a=240-b }
{ 5*20 - b = 12, a=240-b }
{b=112, a=128}