{16x -27y=20 *2
{5x+18y=41,5 *3
{32x-54y=40
{15x+54y=124.5
47x=164.5
x=3.5
y=(41.5-5*3.5)/18=24/18=4/3=1 1/3
ответ (3.5;1 1/3)
{16x -27y=20 *2
{5x+18y=41,5 *3
{32x-54y=40
{15x+54y=124.5
47x=164.5
x=3.5
y=(41.5-5*3.5)/18=24/18=4/3=1 1/3
ответ (3.5;1 1/3)