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Paha777 [63]
2 years ago
6

What does A equal: 3(6a+12)=9

Mathematics
2 answers:
melisa1 [442]2 years ago
5 0

Answer:

a = -3/2

Step-by-step explanation:

3(6a+12)=9

Divide each side by 3

3/3(6a+12)=9/3

6a+12 = 3

Subtract 12 from each side

6a+12-12 = 3-12

6a = -9

Divide by 6

6a/6 = -9/6

a = -3/2

Dvinal [7]2 years ago
3 0

3(6a+12)=9

distribute

18a+36=9

subtraction P.O.E.

18a=-27

division P.O.E.

a=-1.5

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if the product of 4 and a number is decreased by 12, the result is twice the opposite of the number. Find the number. EXPLAIN PL
ELEN [110]
Answer:  The number is:  "2 " .
__________________________________________
Explanation:
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Write the expression; which is an equation, as follows:
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     " 4x <span>− 12 = 2(-x) " ;  in which "x" represents "the number for which we shall                                       solve" .
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Note:  

If the "number" = "x" ;  the "opposite of the number"  =  " -x " ;
</span>___________________________________________
Rewrite as:  " 4x <span>− 12 = -2x " ;
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     →  Add "12" ; & add "2x" ; to EACH SIDE of the equation:

                      4x − 12 + 12 + 2x = -2x + 12 + 2x ;

           to get:    6x  = 12  ;
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                         6x / 6  =  12 / 6 ;

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        →   " 4x − 12 = 2(-x) " ;

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        →   " 4(2) − 12 = ?  2(-2) ?? 

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6 0
3 years ago
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Answer:

$126

Step-by-step explanation:

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Investment is done as per Simple interest.

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Time for which the investment is to done = 7 years

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Interest earned when the investment matures?

Solution:

Formula for Simple Interest :

Simple\ Interest = \dfrac{PRT}{100}

Where P is the principal amount

R is the Rate of Interest

T is the time for which the investment is made

Putting the given values:

Simple\ Interest = \dfrac{3000\times 6\times 7}{100}\\\Rightarrow Simple\ Interest = \dfrac{12600}{100}\\Simple\ Interest = \$126

Therefore, the answer is:

Interest earned is <em>$126</em>.

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