text: math is my most difficult subject as you can tell...:(? last year, nicole had $20,000 to invest. she placed some of it in an account that paid 6% interest per year, and she placed the rest in an account that paid 7% interest per year. after one year, she received $1280 in interest. how much did she place in each account? 0.07*x + 0.06 * (20,000-x) = 1280 0.07*x + (1200 - 0.06*x)   = 1280 (0.07 - 0.06)*x + 1200     = 1280 0.01*x + 1200 - 1200       = 1280 - 1200 0.01 * x                   =  80 100 * 0.01 * x             = 80 * 100 x = 8,000 $8,000 was invested at 7%  and the remaining money 12,000 was invested at 6%