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Calculați
A)
B)
C)
D) ​


Calculați A B C D class=

Răspuns :

A)x+130+2y
2y+x=70=>70+130=200
B)2a+17-6b
a-3b=5
5x2=10(2a-6b)=>10+17=27
C)539+473+161+227=1012+161+227=1173+227=1400
D)6+12+18+24+30+36+42+48+54+60+66+72+78+84+90+96+102+108+114+120+126+132=1518