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Da ca m+c=160,m+i=134,c+i=146
Care sunt numerele?


Răspuns :

m=160-c
i=146-c
160-c+146-c=134
306-2c=134
2c=306-134
2c=172
c=86
m+86=160
m=74
i=146-86
i=60
m+c=160
m+i=134
c+i=146
_______ (adun cele 3 relatii)
2m+2c+2i=440
2(m+c+i)=440=m+c+i=220 
i=220-(m+c)=60
m=134-1=74
c=160-m=86.