Question 756597
Let {{{ x }}} = amount invested at 9%
{{{ 2800 - x }}} = amount invested at 5%
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given:
{{{ .09x + .05*( 2800 - x ) = 180 }}}
{{{ .09x + 140 - .05x = 180 }}}
{{{ .04x = 40 }}}
{{{ x = 1000 }}}
{{{ 2800 - x = 1800 }}}
Amount invested at 9% is $1,000
Amount invested at 5% is $1,800
check:
{{{ .09*1000 + .05*1800 = 180 }}}
{{{ 90 + 90 = 180 }}}
{{{ 180 = 180 }}}
OK