<PRE><B>Question 1114491</B>
x, original amount of money, dollars


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Brandon spent 3/7 of his money. 
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He then had  {{{(4/7)x}}} dollars.


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He gave 3/4 of the remainder to his sister.
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He then had  {{{(1/4)(4/7)x}}} dollars.


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He had $86 left.
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Those two are now equal.
{{{highlight_green((1/4)(4/7)x=86)}}}
Simplify and solve.</PRE>