Question 275132
Let {{{a}}}=amount invested at 5%
Let {{{b}}}=amount invested at 4%
given:
(1) {{{a = 2b}}}
(2) {{{.05a + .04b = 350}}}
Substitute (1) in (2)
(2) {{{.05*2b + .04b = 350}}}
{{{.1b + .04b = 350}}}
{{{.14b = 350}}}
{{{b = 2500}}}
and
{{{a = 2b}}}
{{{2500 = 2b}}}
{{{b = 1250}}}
{{{2500 + 1250 = 3750}}}
She has $3750 invested