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5×(x-3)=75 am nevoie de rezolvare

Răspuns :

5(x-3)=75
5x-15=75 |+15
5x=90 |:5
x=18
5(x-3)=75
5x-5*3=75
5x-15=75
5x=75+15
5x=90
x=90:5
x=18