Sabendo que A+B = 84 e que a proporção entre A e B é igual a 6/8, Assinale a alternativa que corresponde a B - A.
(a) 8
(b) 10
(c) 12
(d) 14
A+B=84
A/B=6/8
8A=6B
A=6B/8
6B/8+B=84
6B+8B=672
14B=672
B=672/14
B=48
A+48=84
A=84-48
A=36
B-A=
48-36=12
c - 12
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Verified answer
A+B=84
A/B=6/8
8A=6B
A=6B/8
6B/8+B=84
6B+8B=672
14B=672
B=672/14
B=48
A+B=84
A+48=84
A=84-48
A=36
B-A=
48-36=12
c - 12