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0,6x-łąki
0,4x=8
x=20ha
E=mb²/2
2E=mb² /÷b²
m=2E/b²
y-łąki hodowcy
100%-60%=40%
40%*x=8 ha
4/10 * x=8 ha
4x=80 ha
x=20 ha
60%*x=y
6/10 * 20 ha= y
y=12 ha
zadanie 2.
E=mb²/2
2E=m*b²
m=(2E)/b²
Ł=60%x
Ł=x-8
x-8=0.6x
x=0,6x + 8
x= 6/10x + 8
x - 6/10x = 8
4/10x= 8
x= 8 * 10/4
x= 80/4
x = 20 ha
2.
E=mb²/2 E/m=b²/2 m/E=2/b²
m=2E/b²