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-3x=-9+6
-3x=-3/:(-3)
x=1
2)2x-6=3x+3
2x-3x=3+6
-1x=9/:9-1)
x=-9
3)6z+8:2=4
6z=4-4
6z=o/:6
z=0
-3x+6= -9
-3x=-9-6
-3x=-15 /:-3
x=5
2.2x-6=3(x+1)
2x-6=3x+3
2x-3x=3+6
-x=9/ :-1
x=-9
3.6z+8:2=4
6z+4=4
6z=4-4
6z=0
to jest równanie sprzeczne