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Iacovicilorenzo
a fost răspuns

afla numarul necunoscut...a -42:7+2=7......28+72:b+12=48........47-56:c-11=29......(56+16:2):8+d=18

Răspuns :

Renatemambouko
a -42:7+2=7
a -6+2=7
a=7+4
a=11

28+72:b+12=48
72:b=48-28-12
72:b=8
b=72:8=9

47-56:c-11=29
47-11-29=56:c
56:c=7
c=56:7=8

(56+16:2):8+d=18
(56+8):8+d=18
64:8+d=18
8+d=18
d=10

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