Resposta:
A)
2+5+8 =15 = 2+a+4
a=9
15=7+5+c ==>c=3
2+7+b=15 ==>b=6
6+d+8=15 ==>d=1
B)
b+d=1+6=7
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Resposta:
A)
2+5+8 =15 = 2+a+4
a=9
15=7+5+c ==>c=3
2+7+b=15 ==>b=6
6+d+8=15 ==>d=1
B)
b+d=1+6=7