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urgent ex 6 plss dau cooana!!

Urgent Ex 6 Plss Dau Cooana class=

Răspuns :

a+b=210=>a=210-b
a-b=10
210-b-b=10
2b=210-10
2b=200
b=200:2
b=100
a=210-100
a=110
a+b=210
a-b=10

a=10+b

10+b+b=210
10+2*b=210
2*b=210-10
2*b=200
b=200/2
b=100

a=10+b, deci a=10+100=110

a+b+210
Verificare 110+100=210

a-b=10
Verificare 110-100=10!

Răspuns: a=110
b=100