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a+4=2(b-4)
a-b=12
a-2b=-12
a-b=12
-a+2b=12
a=36
b=24
drugi worek: y
x-6 = y+6
2(y-4)=x+4
x=y+12
2y-8=y+12 +4
x=y+12
y=24
x=24+12
y=24
x=36
y=24
W pierwszym worku jest 36 kg pszenicy, a w drugim 24 kg