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Решите задачу:

$\left \{ {{28+4x-10x+5y=60y-100} \atop {10y-14+24x-18+240-60x}} \right.$
$\left \{ {{4x-10x+5y-60y=-100-28} \atop {10y+24x+60x=240+18+14}} \right.$
$\left \{ {{-6x-55y=-128} \atop {10y+84x=272}} \right.$
$\left \{ {{6x+55y=128} \atop {10y+84x=272}} \right.$
$\left \{ {{55y=128-6x} \atop {10(128-6x)+84x=272}} \right.$
$\left \{ {{55y=128-6x} \atop {1280-60x+84x=272}} \right.$
$\left \{ {{55y=128-6x} \atop {24x=-1008}} \right.$
$\left \{ {{55y=128-6*42} \atop {x=42}} \right.$
$\left \{ {{55y=-124} \atop {x=42}} \right.$
$\left \{ {{y= \frac{-124}{55} } \atop {x=42}} \right.$