What is the value of x in the equation 8x-2y=48, when y=4

Mathematics

2 answers:

Oksanka [162]3 years ago

8 0

8x - 2y = 48, y =4

8x - 2(4) = 48
8x - 8 = 48
8x = 48+8
8x = 56
x = 56/8 = 7

x = 7

Luden [163]3 years ago

8 0

8x - 2y = 48 equals x = 7.

First, make sure to add in your 4 in replace of the y. Multiply 2 x 4 to get 8. Your problem should look like: 8x - 8 = 48.
Second, add 8 to both sides. Your problem should look like: 8x = 48 + 8.
Third, add 48 + 8 to get 56. Your problem should look like: 8x = 56.
Fourth, divide both sides by 8. Your problem should look like: x = $\frac{56}{8}$ .
Fifth,simplify $\frac{56}{8}$ to get 7. Your problem should look like: x = 7, which is your answer.

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Given:

Principal = $14000

Rate of interest = 10% compounded semiannually.

Time = 11 years.

To find:

The accumulated value of the given investment.

Solution:

Formula for amount or accumulated value after compound interest is:

$A=P\left(1+\dfrac{r}{n}\right)^{nt}$

Where, P is the principal values, r is the rate of interest in decimal, n is the number of times interest compounded in an year and t is the number of years.

Compounded semiannually means interest compounded 2 times in an years.

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