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12: x=16:8
X+10=80:2
X+X=245+X


Răspuns :

12:x= 16:8

12:x=2

x= 12:2

x=6

x+10=80:2

x+10=40

x=40-10

x=30

x+x=245+x

2x-x=245

x=245

Răspuns:

12:x=2

x=12:2

x=6

x+10=40

x=30

2x-x=245

x=245