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2 years ago

-5n+4n-7=8 What is the answer for n and how do you solve it

Mathematics

2 answers:

ra1l [238]2 years ago

7 0

Answer:

-15

Step-by-step explanation:

First combine like terms, aka the variables

-5n+4n-7=8

-1n-7=8

Then, isolate the variable by adding 7 to both sides

-1n-7+7=8+7

-1n=15

Finally, solve by dividing both sides by -1

-1n/-1=15/-1

n=-15

RideAnS [48]2 years ago

6 0

Answer:

n = -15

Step-by-step explanation:

I'll try my best to explain how I solved this

Equation:

-5n + 4n -7=8

Add the light terms on each side:

-n -7 =8

Separate the variables from the numbers:

-n = 15

Do the operation necessary to solve it:

n = -15

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Answer:

A)2,6,10

B)2,-6,-18

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Step-by-step explanation:

A)a1=-2 and d=4

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$a_{n}=a_{1}+(n-1)d$

Now

$a_{2}=a_{1}+(2-1)d$

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Substituting the given value we get

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Similarly

$a_{3}=a_{1}+(3-1)d$

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Substituting the given value we get

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Substituting the given value we get

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B $a_n=a_{(n-1)}-8$ with $a_1=10$

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Substituting the given value

$a_2= 10-8$

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$a_3=a_{2}-8$

Substituting the value

$a_3=2-8$

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Substituting the value

$a_4= -6-8$

$a_4= -14$

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Here the difference is -2

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$a_{n}=a_{1}+(n-1)d$

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