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An actor invests some money at 8% and 42000 more than 3 times the amount at 11% . The total annual intrest is $51770. How much did she invest at 8% ?
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An actor invests some money at 8% and 42000 more than 3 times the amount at 11% . The total annual intrest is $51770. How much did she invest at 8% ?
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note
x = amount invested at 8%
x + 42000 = amount invest at 11%
8% = .08
11% = .11
so
.08x + .11(x + 42000) = 51,770
.08x + .11x + 4620 = 51770
.19x = 47,150
x = 148,157.90