Question 83379
{{{.03*x + .04*(6000 - x) = 220}}}
{{{.03x + 240 - .04x = 220}}}
{{{-.01x = -20}}}
{{{.01x = 20}}}
{{{x = 2000}}} dollars invested @ 3%
{{{6000 - x = 4000}}} dollars invested @ 4%
check
{{{.03*x + .04*(6000 - x) = 220}}}
{{{.03*2000 + .04*(6000 - 2000) = 220}}}
{{{60 + 240 - 80 = 220}}}
{{{220 = 220}}}
OK