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a_sh-v [17]
3 years ago
12

-n - 6n + 4 = 53 How do I solve this

Mathematics
2 answers:
sergij07 [2.7K]3 years ago
6 0

Answer:

-n - 6n + 4 = 53

-7n + 4 = 53

-7n + 4-4 = 53-4

-7n = 49

-7n/-7 = 49/-7

n = -7

BY GERALD GREAT

NemiM [27]3 years ago
3 0

Answer:

- n - 6n + 4 = 53 \\  \\  - n - 6n = 7n \\  \\ 7n = 53 - 4 \\  \\   \ \\ 7div 7n = 49  \div 7 \\  \\ n =   7

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Answer:

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Step-by-step explanation:

Let n and p represent the unit cost of notebooks and the unit cost of pens.

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Let's use elimination by addition/subtraction to find n and p.

Multiplying the first equation by -3, we get          -9n - 6p = -$31.35

and then combine this with the second:               4n + 6p =   $17.60

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Dividing both sides by 55, we get n = $13.75 / 5, so we now know that n = $2.75.  Each notebook costs $2.75.

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