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(2×36 +2×84 +2×43)-(2×30+ 2×52 +2×34)=

Răspuns :

(2x36+2x84+2x43)-(2x30+2x52+2x34)=(72+168+86)-60+104+68)=256-232=24
(73+168+68)-(60+104+68)= (241+68)-(164+68)= 309-232= =77