Rico invests some of his savings at 3 percent per year & an equal amount at 5 percent per year. His income totals 1,800 a year. How much did Rico invest at each rate?

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Answer 1 · 2018-01-31T12:01:20

22500

Let the equal amount in each account be #x#

Then we have:
#3%x+5%x=1800#

Factor out the #x#

#x(3%+5%)=1800#

#x xx8/100=1800#

Multiply both sides by #100/8#

#x=1800xx100/8#

#x=225xx100=22500#