Telegram Group & Telegram Channel
Answer to Q82

A - 4B + 2C = 16, 2A + 7B - 5C = 83. What is A + B - C?

A - 4B + 2C = 16 (eqn i)
2A + 7B - 5C = 83 (eqn ii)
A + B - C (eqn iii)

Multiply (eqn i) by 2
2A - 8B + 4C = 32 (eqn iv)

Subtract (eqn ii) from (eqn iv)
-15B + 9C = -51
C = (-51 + 15B) ÷ 9 (eqn v)

Putting (eqn v) into (eqn i)
A - 4B - (102 ÷ 9) + (30B ÷ 9) = 16
A = 16 + 4B + (102 ÷ 9) - (30B ÷ 9) (eqn vi)

Putting (eqn vi) and (eqn v) into (eqn iii)
16 + 4B + (102 ÷ 9) - (30B ÷ 9) + B + (51÷ 9) - (15B ÷ 9)

Making 9 the common factor
(144 + 36B - 30B + 102 + 9B + 51 - 15B) ÷ 9
297 ÷ 9
= 33

Answer: 33



tg-me.com/RiddlesRepositoryAnswers/89
Create:
Last Update:

Answer to Q82

A - 4B + 2C = 16, 2A + 7B - 5C = 83. What is A + B - C?

A - 4B + 2C = 16 (eqn i)
2A + 7B - 5C = 83 (eqn ii)
A + B - C (eqn iii)

Multiply (eqn i) by 2
2A - 8B + 4C = 32 (eqn iv)

Subtract (eqn ii) from (eqn iv)
-15B + 9C = -51
C = (-51 + 15B) ÷ 9 (eqn v)

Putting (eqn v) into (eqn i)
A - 4B - (102 ÷ 9) + (30B ÷ 9) = 16
A = 16 + 4B + (102 ÷ 9) - (30B ÷ 9) (eqn vi)

Putting (eqn vi) and (eqn v) into (eqn iii)
16 + 4B + (102 ÷ 9) - (30B ÷ 9) + B + (51÷ 9) - (15B ÷ 9)

Making 9 the common factor
(144 + 36B - 30B + 102 + 9B + 51 - 15B) ÷ 9
297 ÷ 9
= 33

Answer: 33

BY Riddles Repository - Answers


Warning: Undefined variable $i in /var/www/tg-me/post.php on line 283

Share with your friend now:
tg-me.com/RiddlesRepositoryAnswers/89

View MORE
Open in Telegram


Riddles Repository Answers Telegram | DID YOU KNOW?

Date: |

Telegram announces Search Filters

With the help of the Search Filters option, users can now filter search results by type. They can do that by using the new tabs: Media, Links, Files and others. Searches can be done based on the particular time period like by typing in the date or even “Yesterday”. If users type in the name of a person, group, channel or bot, an extra filter will be applied to the searches.

What is Telegram?

Telegram is a cloud-based instant messaging service that has been making rounds as a popular option for those who wish to keep their messages secure. Telegram boasts a collection of different features, but it’s best known for its ability to secure messages and media by encrypting them during transit; this prevents third-parties from snooping on messages easily. Let’s take a look at what Telegram can do and why you might want to use it.

Riddles Repository Answers from ca


Telegram Riddles Repository - Answers
FROM USA