Question 1128417
part at 0.07: x
part at 0.08: 15,000 - x
0.07x + 0.08(15000 - x) = 1,180
now just do the math. First distribute the 0.08:
0.07x + 1,200 - 0.08x = 1,180 
-0.01x = -20 divide, and remember that -/- = +
x = 2,000
:
the woman invested 2,000 at 7%