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a=3×b (a+b)x2=45 (metoda grafica)

Răspuns :

a=3×b

(a+b)x2=45...a+b=45:2....a+b=22,5

|___|___|___| a
|___| b

3+1=4 (segmente egale)

22,5:4=5,625 (valoarea unui segment)

a=3×5,625 = 16,875

b=1×5,625 = 5,625

verificare:
a=3×b

16,875=3×5,625
16,875=16,875

(a+b)x2=45
(16,875+5,625)×2=45
22,5×2=45