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Bad White [126]
2 years ago
12

The sum of two numbers is 21.The second is 6 times the first number .work out the two numbers

Mathematics
2 answers:
antiseptic1488 [7]2 years ago
5 0

Answer:

<h2>3 and 18</h2>

Step-by-step explanation:

n-first\ number\\\text{the second number is 6 times the first number}\\6n-second\ number\\\\\text{the sum is 21:}\\\\n+6n=21\\7n=21\qquad\text{divide both sides by 7}\\\boxed{n=3}\\\\6n=6(3)\\\boxed{6n=18}

Nimfa-mama [501]2 years ago
4 0

Answer:

Sum of the two numbers is 21 and Second number is six times the first number

x+6x = 21

7x = 21

x = 21/7

x = 3

substitute x value in 6x to find second number,

 = 6x

 = 6*3

 = 18

Therefore first number is 3 and second number is 18

Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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2 years ago
-14(3a+6)=12(6-4a)+12 and steps please
Sunny_sXe [5.5K]

Answer:

In the given equation -14(3a+6)=12(6-4a)+12 the value of a is 28

Step-by-step explanation:

Given equation is -14(3a+6)=12(6-4a)+12

To simplify the given equation:

-14(3a+6)=12(6-4a)+12

Taking all terms to one side

-14(3a+6)-12(6-4a)-12=0

-[14(3a+6)+12(6-4a)+12]=0

Now dividing by negative sign on the above equation we get

14(3a+6)+12(6-4a)+12=0 (using distributive property)

42a+84+72-48a+12=0 ( adding the like terms )

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-6a=-168

6a=168

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Therefore a=28

Therefore in the given equation -14(3a+6)=12(6-4a)+12 the value of a is 28

8 0
3 years ago
It would mean a lot to me if you helped with math, i really cant concentrate because my grandfather just passed away and yea ple
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Step-by-step explanation:

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