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cat face X?
5×(5X-5)-120=30​


Răspuns :

Răspuns:

5×(5 X-5)-120=30

5×(5X-5)=30+120

5×(5X-5)=150

(5X-5)=150:5

(5X-5)=30

5X=30+5

5X=35

X=35÷5

X=7