-9z -7 = -z -6 /+z
-8z-7=-6 /+7
-8z=1 /·(-1)
8z=-1 //8
z=-0,125
-9·(-0,125)-7=-(-0,125)-6
1,125-7=0,125-6
-5,875=-5,875
1=1
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-9z -7 = -z -6 /+z
-8z-7=-6 /+7
-8z=1 /·(-1)
8z=-1 //8
z=-0,125
-9·(-0,125)-7=-(-0,125)-6
1,125-7=0,125-6
-5,875=-5,875
1=1