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{6(x+y)=180+6
6x + 5,4y = 178,8
6x + 6y = 186 /*(-1)
6x + 5,4y = 178,8
-6x - 6y = -186
-0,6y = -7,2
y = 12
6x = 186 = 6y
x = 31 - y
x = 31 - 12
y = 12
x = 19
{6(x+y)=180+6
{6x+5,4y=178,8
{6x+6y=186 //*(-1)
{6x+5,4y=178,8
+{-6x-6y=-186
-0,6y=7,2 //:(-0,6)
y=12
6x+6*12=186
6x=186-72
6x=14 //:6
x=2i1/3
{x=2i1/3
{y=12