Question 682819
.08x+.12y = 3840 ⇒ x is $ at 8%, y is $ at 12%
y = x + 2000
.08x + .12(x+2000) = 3840
.08x + .12x + 240 = 3840
.2x = 3840 - 240
.2x = 3600
x = 18,000 at 8%
y = 18,000 + 2000 = 20,000 at 12%