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20xe-(1950+550):100=6175

Răspuns :

20×e-2500:100=6175
20×e-25=6175
20×e=6175+25
20×e=6200
e=6200:20
e=310
20·e-2500:100=6175
20·e-25=6175
20·e=6175+25
20·e=6200
e=6200:20
e=310