Răspuns :
x+y+z=1100
x+100=y
60*x=z
inlocuim in ecuatie
x+(x+100)+60x=1100
62x=1100-100
x=1000/62
x=500/31
y=500/31+100
y=(500+3100)/31
y=3600/31
z=60x
z=500/31*60
z=30000/31
Verificare (500+3600+30000)/31=1100
x+100=y
60*x=z
inlocuim in ecuatie
x+(x+100)+60x=1100
62x=1100-100
x=1000/62
x=500/31
y=500/31+100
y=(500+3100)/31
y=3600/31
z=60x
z=500/31*60
z=30000/31
Verificare (500+3600+30000)/31=1100
a+b+c=1100    a=100+b    a=60c sau 60xc  c=a:60
100+b+b+c=1100 minus 100
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    2b+c=1000
2b+a:60=1000x 60
2b+a=6000Â Â Â Â Â Â Â Â Â Â Â inlocuiesti a
2b+b+100=6000Â Â minus 100
3b=6000:3
b=300Â Â Â Â Â Â Â a=301Â Â Â Â Â Â Â Â c=399
100+b+b+c=1100 minus 100
Â
    2b+c=1000
2b+a:60=1000x 60
2b+a=6000Â Â Â Â Â Â Â Â Â Â Â inlocuiesti a
2b+b+100=6000Â Â minus 100
3b=6000:3
b=300Â Â Â Â Â Â Â a=301Â Â Â Â Â Â Â Â c=399