The fx-991MS lacks the inverse operator so the matrix inverse is not possible, Try 991Es instead
fx=5x1 / 9
29
g(x) = x/2
y=x
3
-14x-7 = 35 -14x = 35+7 -14x = 42 x = -3
14x + 6 = 6 14x + 6 - 6 = 6 - 6 14x = 0 14x / 14 = 0 / 14 x = 0
-14x
If f(x)=(5x-1)/9 Then the inverse is x=(5y-1)/9 9x=5y-1 9x+1=5y (9x+1)/5=y The inverse is f(x)=(9x+1)/5
-11
If: -14x = -98 Then: x = 7