Question 206724
Can you help me in translating this statement into equation? 
"A man has three sums of money invested, one at 4%, one at 5% and one at 3%.
 His total yearly income from the three investments is P1400.
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Interest Equation: 0.04x+0.05y+0.03z = 1400
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The last investment yields 100 more per year than the other two combined.
Interest Eq: 0.03z = (0.04x+0.05y)+100
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 If he could receive 1% more on each investment, his annual income would be increased by P400.
Interest Eq: 0.05x + 0.06y + 0.04z = 1400+400
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 How much does he have invested at each rate?

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Cheers,
Stan H.