Answer:
Step-by-step explanation:
10x+10y=-10
9x+10y=18
= 10x+10y=-10
-9x-10y=18
= x=8
step two is to find y:
10x+10y=-10
10(8)+10y=-10
80+10y=-10
10y=-90
y=-9
your answer:
(x,y)= (8,-9)
Answer:

Step-by-step explanation:
<u>Step 1: Multiply
</u>


<u>Step 2: Combine
</u>


Answer: 
The slope of the line is -10.5.