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Rezolvati in Q ecuatia

1.   |18 -x|=3.24
2.   |3x+9|=-6
3.   |0.01x-0.02|=0

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Răspuns :

|18-x|=3.24  18-x=3.24 sau 18-x=-3.24
                  -x=3.24-18          -x=-3.24-18
                  -x=-14.76             -x=-21.24
                  x=-14.76:(-1)          x=-21.24:(-1)
                  x=14,76                   x=21.24

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