Answer:
-2
Step-by-step explanation:
do you need an walk through?
To get you answer multiply .3 and 2.7
Let d(x) = 2x - 4
Or
y = 2x - 4
We have replace x = y
x = 2y - 4
Now Isolate "y"
x + 4 = 2y
Pass "2" dividing
(x + 4) / 2 = y
y = x/2 + 2
Or
d(x)^-1 = x/2 + 2
9(-2)+x=-8
And x would be positive 26
