Subtract the sum of (2x - 3y + 7z) and (4z - 5x) from (12x - z).

Correct option is A

Given:

Expressions:

$(2x-3y+7z)$

$(4z-5x)$

$(12x-z)$

Solution:

The sum of (1)(1): 
:

$$(2x-3y+7z)+(4z-5x)$$

= (2x − 5x) − 3y + (7z + 4z)

= − 3x − 3y + 11z.

Now, Subtract this sum (3)

$$(12x-z)-(-3x-3y+11z)$$

= 12x − z + 3x + 3y − 11z.

= 15x + 3y − 12z.

(12x+3x)+3y+(−z−11z)=15x+3y−12z.(12x + 3x) + 3y + (-z - 11z) = 15x + 3y - 12z.The correct answer is option ( a )15x+3y−12z.​