3 years ago

How do you solve this 2x +5 - 7x = 15

1 answer:

7 0

1. combine like terms (2x and -7x) to create -5x
2. subtract 5 from each side to create: -5x=10
3. divide both sides by -5
4. x=-2

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Help to solve -7 - 3a = 1 - 4a

Evgesh-ka [11]

Answer:

-7 - 3a = 1 – 4a

Step one: Add 4a to -3a

-7 + a = 1

Step two: Add 7 to 1

A = 8

You're done! A=8 for this problem!

Hopefully this helps! Feel free to mark brainliest!

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Time sensitive question. Find the sum of the first 26 terms of an arithmetic series whose first term is 7 and 26th term is 93.

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ANSWER

$S_{26}=1300$

EXPLANATION

The sum of an arithmetic sequence whose first term and last terms are known is calculated using

$S_{n}= \frac{n}{2} (a + l)$

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The sum of the first 26 terms is

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$S_{26}= 13 (100)$

$S_{26}=1300$

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