Răspunsuri

  • Utilizator Brainly
2014-11-17T15:55:03+02:00
D=diferenta
S=suma


S.I______I______I______I______I+40
D.I______I..........diferenta..............=>3*D+40

340=3*D+40
340-40=3D
300=3D
D=100

S=D+340
S=100+340
S=440

Acum stim  si suma si diferenta numerelor .

a+b=440
a-b=100=>a=100+b

100+b+b=440
100+2b=440
2b=440-100
2b=340
b=340:2
b=170

a=100+b
a=100+170
a=270

Verificare : 270+170=440


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