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(x+1)-(x-1)-1=x+1-x+1=1
zad.2
1/2(x-1)=4=1/2x+1/2-1=4=3
licze na naj
2. 1/2x-1/2=4
1/2x=4-1/2
1/2x=3/2 /to mnożymy razy 2
x=3
(x+1)-(x-1)-1
x+1-x-1-1
-1
odp.-1
zad.2
1/2(x-1)=4
1/2x-1/2=4
1/2x=4+1/2
1/2x=4 1/2 /podzielic1/2
x=2