Question 561492
Let {{{ x }}} = amount invested in CD
{{{ .04x }}} = interest from CD
{{{ .07*( 9000 - x ) }}} = interest from savings bond
given:
{{{ .04x + .07*( 9000 - x ) = 540 }}}
{{{ .04x + 630 - .07x = 540 }}}
{{{ -.03x = -90 }}}
{{{ .03x = 90 }}}
{{{ x = 3000 }}}
{{{ 9000 - x = 9000 - 3000 }}}
{{{ 9000 - x = 6000 }}}
$3,000 was invested in the CD
$6,000 was invested in savings bond