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1) [(78:b+5):2+40]:7-300:50=1 2) 100-[50-(38-5xc)x8-2]:3+4=96 3) 50-[24-(170-d:4):10]x2-9=7

Răspuns :

1) [(78:b+5):2+40]:7-300:50=1 [78:b+5):2+40]:7-6=1[78:b+5):2+40]:7=1+6[78:b+5):2+40]:7=7(78:b+5):2+40=7x7(78:b+5):2+40=49(78:b+5):2=49-40(78:b+5):2=978:b+5=9x278:b+5=1878:b=18-578:b=13b=78:13b=6