nico is saving money for his college education. He invests some money at 6%, and $1400 less that that amount at 5%. The investments produced a total of $172 interest in 1 yr. how much did he invest at each rate?
Let x be the amount he invested at 6%.
Then x-1400 is the amount he invested at 5%.
Total interest after 1 year
posted by MathMate