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AJJUUTTTOOORRRRR!(HEELLPPPPPPPPPPP)

AJJUUTTTOOORRRRRHEELLPPPPPPPPPPP class=

Răspuns :

1)

2+(2×2÷2)-(2×2÷2)=4-2=2

2)

a+b=900

a×2+b=1200

1200-900=300( valoarea lui a)

300+b=900

b=900-300=600

(300×2)+(600×3)=600+1800=2400