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-6z-6=-6z+1
-6z-6z=1+6
0z=7 No tiene solución
b) 11y – 5y + 6 = -24 – 9
6y+6=-33
6y=-33-6
6y=-39
y=-39/6
y=-13/2
c) 1 – 4w = 9
-4w=9-1
-4w=-8
w=-8/-4
w=2