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Juli2301 [7.4K]
3 years ago
14

Is -5 a solution for the equation 5x - 12 = -5(-x + 13)

Mathematics
2 answers:
Liono4ka [1.6K]3 years ago
7 0

Answer:

No.

Step-by-step explanation:

Substitue x = -5 in the equation 5x - 12 = -5(-x + 13)

You'll eventually get -37=-90

Is this true? No!

spayn [35]3 years ago
7 0

No I don't think so..

Answer:

-53

Step-by-step explanation:

<u><em>Distribute</em></u>

5 − 1 2 = − 5 ( − +1 3 )

5 − 1 2 = 5 − 6 5

<em><u>Add  1 2  to both sides of the equation  </u></em>

5x-12=5x-65

5x−12+12=5x−65+12

<em><u>Simplify</u></em>

<em><u> </u></em>5x=5x-53

<u><em>Subtract   5x  from both sides of the equation</em></u>

5x=5x-53

5x-5x=5x-53-5x

<em><u>Simplify</u></em>

-53

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4 years ago
A bank loaned out $37,500, part of it at the rate of 11% annual interest, and the rest at 9% annual interest. The total interest
kondaur [170]

Answer:

The Loan amount at 11 % interest rate is $ 18,500   And

The Loan amount at 9 % interest rate is $ 19,000

Step-by-step explanation:

Given as :

Let The loan given at interest rate of 11 % annual  = $ x

And The loan given at interest rate of 9 % annual = ($37,500 - $ x)

Total interest fro both loan = $3745

I.e  CI 1 + CI 2 = $3745

Now, From compound interest method :

Amount= Principal\times (1 + \frac{Rate}{100})^{Time}

A 1 = $ 1\times (1 + \frac{11}{100})^{1}

Or,  A 1 = $ 1.11 x

<u>Similarly</u>

A 2 = ($37,500 -x ) \times (1 + \frac{9}{100})^{1}

Or, A 2 = 1.09 × ($37,500 - $ x)

∵  Compound Interest = Amount - principal

Or, $ 3745 = CI 1 + CI 2

Or,  $ 3745 = ($ 1.11 x - $ x) + ( 1.09 × ($37,500 - $ x) -  ($37,500 - $ x) )

Or,  $ 3745 = $ .11 x+  ($37,500 - $ x) ( .09 )

Or,  $ 3745 = $ .02 x + $ 3375

or,  0.02 x =  $ 3745 - $ 3375

∴   x = $ \frac{370}{.02}

SO,  x = $ 18,500

And $ 37500 - x = $ 19,000

Hence The Loan amount at 11 % interest rate is $ 18,500   And

           The Loan amount at 9 % interest rate is $ 19,000   Answer

4 0
4 years ago
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