-2(2)-6(-2)-5
-4+12-5
Answer is 3
X-y=1
x+y=3
You see the y's can cancel out. So add it together and you have:
2x=4
x=2
Now that you have x, plug it in to one of the equations to find y.
I will plug it into the first one.
(2)-y=1
-y=-1
y=1
Answer:
X=3
Step-by-step explanation:


Group like terms




(-6m^7 + 20m^6) = 2m^4(-3m^3 + 10m^2)
Therefore, (-6m^7 + 20m^6) ÷ 2m^4 = -3m^3 + 10m^2