A total of $11000 was invested. Part of the 11000 was invested at 4% and the rest at 7%.?

Bruno Galasso: let $ x be invested @ 7% and so $ (11,000 - x) invested @ 4 %, then[7/100]x + [4/100][11000 - x] = 680multiply throughout by 1007x + 4(11000 - x) = 68,0003x = 24,000x = 8,000(11,000 - x) = 3000ans:-----$ 3,000 @ 4%$ 8,000 @ 7%hint:-----in problems of this sort,take investment at higher rate as xit avoids getting - x.... = .....(which adds another step & may confuse, too )...Show more