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Nico is saving money for his college education. He invests some money at 8% and $1400 less then the amount at 7%. The investments produced a total of $217 interst in one yeat. How much did he knvest at each rate?
So far I have 0.08 (1400)(0.07)

Answer :

Interest after 1 year 
x*0.06+(x-1400)*0.05=172 
0.11x=172+1400*0.05 
0.11x=242 
x=2200 

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