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P=4-3*3=4-9=-5
nie spełnia
b)L=4(3-1)=4*2=8
P=3+5=8
spełnia
6= 4 - 3x
6=4-3*3
6=4-9
L≠P
b) x=3
4*(x-1)=x+5
4*(3-1)=3+5
4*2=3+5
8=8
L=P