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Ksenya-84 [330]
4 years ago
7

Zora solved the equation 39=x−12. Her work is shown. What error did Zora make?

Mathematics
1 answer:
Wewaii [24]4 years ago
8 0

Answer:

Step-by-step explanation:

39 = x - 12

Adding 12 to both side

39 + 12 = x - 12 + 12

51 = x

X = 51

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<h3><u>Solution:</u></h3>

Given that, You invested money in two funds.  

Last year, the first fund paid a dividend of 8% and the second a dividend of 5%, and you received a total of $1330.  

This year, the first fund paid a 12% dividend and the second only 2%, and you received a total of $1500.

Let the amount in Fund I be $x and amount in Fund II be $ y

Then, for last year ⇒ 0.08x+0.05y=1330 ----- eqn (1)  

And for this year ⇒ 0.12x+0.02y=1500 ------- eqn (2)  

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Subtract the two equations  

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Now, from eqn (2)  

0.12(11000) + 0.02y = 1500  

0.02y = 1500 – 1320  

0.02y = 180  

y = 9000

Hence, he invested 11000 in in 2st fund and 9000 in 2nd fund

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