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XKWA=18
X=PIERWIASTEK Z 18
B)2XKWA-1=17
2XKWA=17+1
2XKWA=18/:2
XKWA=9
X=3
C)6XKWA-1 3/5=0
6XKWA=1 3/5/:6
XKWA=1 3/5*1/6
XKWA=8/5*1/6
XKWA=8/30
X=PIERWIASTEK Z 8/30=PIERWIASTEK Z 4/15
D)1-2XKWA=5+XKWA
-2XKWA-XKWA=5-1
XKWA=4
X=2
E)12-3XKWA=0
-3XKWA=-12/*-1
3XKWA=12/:3
XKWA=4
X=2
F)XKWA-2X=0
X(X-2)=0
LUB XKWA=2X
X=PIERWIASTEK Z 2X LUBX-2=0 TO X=2
G)3XKWA+8X=0
X(3X+8)=0
3X+8=0
3X=-8/:3
X=-8/3
X=-2 2/3