Help me please I need this for my test tomorrow please

Step-by-step explanation:

Hey, there!!

You can solve it simply,

1.

Given,

x= 1 , y=2 , z= 3

To solve:

Taking LCM,

Therefore, the final answer is 4/5.

2.

Given,

x= 1 , y= -2, z= -1.

To solve:

Taking LCM,

Cancelling the minus sign,

is the final answer.

3.

Given,

x= -3, y= -1, z= 4

To solve:

Therefore, the answer is 10/9.

4.

Given,

x= 1/2, y=1, z=1.

To solve:

Simplifying them ,

Therefore, the answer is 3.

Hope it helps...