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Sa se afle numerele a,b,c stiind ca :
a+b+c=130;
b=a+(130:2-5);
c=b-(130-10):6;


Răspuns :

b=a+(130:2-5)
b=a+(65-5)
b=a+60
c=b-(130-10):6
c=b-120:6
c=b-20

a /..../
b/...../60/    suma=130
c/..../60/-20/

130+20-(60+60)=
=150-120=
=30(3a)
30:3=10(a)
10+60=70(b)
70-20=50(c)