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rezolvati ecuatia 123-(30+x)=60

Răspuns :

123 - 30 - x  = 60
93 -x = 60
x = 93 -60
x = 33
123-(30+x)=60
30+x=123-60
x=123-60-30
x=63-30
x=33

Verificare:
123-(30+33)=60
123-63=60
60=60

Solutie:
x=33