Let x = amount ($) invested in Fund B then 4x = amount ($) invested in Fund A . .03x + .02(4x) = 1210 .11x=1210 x=$11000 that means $11000 amount ($) is invested in Fund B Solution Let x = amount ($) invested in Fund B then 4x = amount ($) invested in Fund A . .03x + .02(4x) = 1210 .11x=1210 x=$11000 that means $11000 amount ($) is invested in Fund B.