Answer:
infinite
Step-by-step explanation:
Let the linear equation in two variables be ax+by+c=0
Put values


Hence for any values it has infinite number of solutions .
including x=1 and y=3
Answer: -8 and -4
This is something you do through trial and error. Making a list or a table like shown below might help.
1.

2.
<u> </u><u>Sub (1, -5) into equation to find '</u><em><u>b'</u></em><u />
3.

4.
Ohh well when u type in another question it should show a pic option at the bottom once your done typing whatever is u wish to ask :)