Question 542951
"I have tried x+y=19000 and 0.4x+0.6y=1000"
.
.
Have you tried x+y=19,000 and 0.04x+0.06y=$1000?
.
1) {{{x+y=19000}}}
2) {{{0.04x+0.06y=1000}}}
.
1) {{{x+y=19000}}}
2) {{{4x+6y=100000}}}
.
1) {{{6x+6y=114000}}}
2) {{{4x+6y=100000}}}
.
.
Subtract: {{{2x=14000}}}, so {{{x=7000}}}
.
Easier: 
{{{x+y=19000}}}
{{{7000+y=19000}}}
{{{y=12000}}}