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Marie earned an extra $10,000 last year from a commission-based job. She invested part of the money at 10% and the rest at 8%. She made a total of $940. How much was invested at 8%? How much was invested at 10%?

Respuesta :

x amount invested at 10%
.10x + .08(10000-x) = $940
x = 140/.02 = 7000, invested at 10%. 300010000-7000 at 8%

The amount invested at 10% is $7000 and the amount invested at 8% is $3000.

How to find the invested amount?

Let consider x amount invested at 10%

0.10x + 0.08(10000-x) = $940

0.10x + 800 - 0.08x = $940

x = 140/.02

x = 7000, invested at 10%.

Let consider y amount invested at 8%

y = 10000-7000

y = 3000 at 8%

Hence, the amount invested at 10% is $7000 and the amount invested at 8% is $3000.

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