Question 984841
Let {{{ x }}} = the amount of her bonus in dollars
{{{ (2/3)*x }}} = amount deposited in 5% CD 
{{{ (1/6)*x }}} = amount deposited in 2% savings account
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Find the interest income from both deposits
{{{ .05*(2/3)*x + .02*(1/6)*x = 231 }}}
Multiply both sides by {{{ 6 }}}
{{{ .2x + .02x = 1386 }}}
{{{ .22x = 1386 }}}
{{{ x = 6300 }}}
The amount of her bonus was $6,300
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check answer:
{{{ .05*(2/3)*6300 + .02*(1/6)*6300 = 231 }}} 
{{{ .1*2100 + .01*2100 = 231 }}}
{{{ 2100*.11 = 231 }}}
{{{ 231 = 231 }}}
OK