Add.
( $5$ y $- 7$ x + $2$ z )+ ( $4$ z $- 8$ y + $5$ x ) + ( $13$ y + $5$ z $- 5$ x )
A) -22x + 10y + 10z
B) -7x + 10y + 12z
C) 22x -10y + 2z
D) -7x + 10y + 11z
E) 22x + 18y + 11z

Question

Add.  
( $5$ y $- 7$ x + $2$ z )+ ( $4$ z $- 8$ y + $5$ x ) + ( $13$ y + $5$ z $- 5$ x )
A) -22x + 10y + 10z
B) -7x + 10y + 12z
C) 22x -10y + 2z
D) -7x + 10y + 11z
E) 22x + 18y + 11z

Quizplus · Accepted Answer

We can simplify the expression by combining like terms. 
Combining the x-terms: (-7x) + 5x - 5x = -7x
Combining the y-terms: 5y - 8y + 13y = 10y
Combining the z-terms: 2z + 4z + 5z = 11z
Putting these together, we get -7x + 10y + 11z, which matches choice D.

Add 555 Y −7- 7−7 X 222 Z )+ 444

Add
$5$ Y $- 7$ X $2$ Z )+ $4$