For X the answer would be..

Now for Y the answer would be..

Answer:
X=3
Step-by-step explanation:
1-move the (9v) to the other side and change it to negative and it will be (13v-9v=12)
2-Collect like terms and it will be (4v=12)
3-Divide both sides on 4 and it will be (v=3)
It would be (rounded) 5
Because
31 / 6.15 = 5.04065
Hope this helped
Have a great day/night