Answer:
Step-by-step explanation:
we have that
5x – 3y – x + 6z
5x – x – 3y + 6z------> this step is correct
5 + 3yz------> is not correct
because
1) 5x-x=5---> is not correct
the correct is
5x-x=4x
2) -3y+6z=3yz-----> is not correct
the correct is
-3y+6z=3*(2z-y)
therefore
,
the correct solution is
4x+3*(2z-y)
