Question

Subtract the sum of 13x - 4y + 7z and -6z + 6x + 3y from the sum of 6x - 4y - 4z and 2x + 4y - 7

Answer 1

Answer:

- 11x - 3z - 7 - y

Step-by-step explanation:

First,

We have to add the both two equations together

=> 13x -4y + 7z

+ 6x +3y - 6z

19x - y + z

And

6x - 4y - 4z

+ 2x +4y - 7

8x - 4z - 7

Then,

We have to solve both the equations

=> 8x - 4z - 7

- 19x + z - y

- 11x - 3z - 7 - y

Note:

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The COVID-19 virus spreads primarily through droplets of saliva or discharge from the nose when an infected person coughs or sneezes, so it’s important that you also practice respiratory etiquette (for example, by coughing into a flexed elbow).

At this time, there are no specific vaccines or treatments for COVID-19. However, there are many ongoing clinical trials evaluating potential treatments. WHO will continue to provide updated information as soon as clinical findings become available.

Answer 2

~First we have to find the sum of 13x – 4y + 7z and – 6z + 6x + 3y

Therefore, sum of $\sf \big \: (13x – 4y + 7z) \: and \: (–6z + 6x + 3y)$

$\large \sf \: = (13x – 4y + 7z) + (–6z + 6x + 3y)$

$\large \sf \: = (13x – 4y + 7z – 6z + 6x + 3y)$

$\large \sf = (13x + 6x – 4y + 3y + 7z – 6z)$

$\large \sf \underline{= (19x – y + z)}$

~Now we have to find the sum of (6x – 4y – 4z) and (2x + 4y – 7)

$\large \sf \: = (6x – 4y – 4z) + (2x + 4y – 7)$

$\large \sf \: = (6x – 4y – 4z + 2x + 4y – 7)$

$\large \sf \: = (6x + 2x – 4z – 7)$

$\large \sf \underline{\: = (8x – 4z – 7)}$

~Now, required expression = (8x – 4z – 7) – (19x – y + z)

$\large \sf \: = 8x \: – \: 4z \: – \: 7 \: – \: 19x + y \: – \: z$

$\large \sf \: = 8x \: – \: 19x + y \: – \: 4z \: – \: z \: – \: 7$

$\large \sf \underline{ \: = – \: 11x + y \: – \: 5z \: – \: 7}$