Answer:
x =
Step-by-step explanation:
Given
A = xy
Multiply both sides by 2 to clear the fraction
2A = xy ( divide both sides by y )
= x
(-1,3)
so y=x+4 and y=-2x+1
obviously, y=y
so that means that x+4 is equal to -2x+1
let's use that
y=x+4,y=-2x+1
y=y
x+4=-2x+1
x+2x=1-4
3x=-3
x=-1
y=x+4
y=(-1)+4
y=3
-42
1. 4(-2)
2. 3(-8)
3. -8 + -10 + -24
4. cobine like terms
5. -42
I think this is correct and what you wanted
