Question 901176
x+y=17000,
0.06*x+0.09*y=1230
x=17000-y
0.06*(17000-y)+0.09*y=1230
1020-0.06y+0.09*y=1230
0.03*y=210
y=7000 at 9%
x=17000-y
x=10000 at 6%
check
0.06*10000+0.09*7000=1230
600+630=1230
1230=1230
ok