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{-8=a+b /*2
{8=-2a+b
{-16=2a+2b
8-16=-2a+b+2a+2b
-8=3b /b
- 8/3 =b
8=-2a- 8/3
2a=-8- 8/3
2a=-10 2/3 /2
a= -16/3
Zadanie2
-2=-4*(-3)+b
-b=2+12
b=-14
y=-4x-14