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Aflati x din urmatoarele ecuatii: a)x-134=427. b)326+x=507

Răspuns :

x-134=427
x=427+134
x=561

326+x=507
x=507-326
x=181
x-134=427
x=427+134
x=561

326+x=507
x=507-326
x=181