4(x-6)-5(y+8)=90
F(x)=
You have not defined what F(x) is.
If you want to know what y is in terms of x, rearrange your equation to put y on the left side.
5y = 4x -24 -40 -90
= 4x - 154
y = (4/5)x - (154/5)
F(x)=
If you want to know what y is in terms of x, rearrange your equation to put y on the left side.
5y = 4x -24 -40 -90
= 4x - 154
y = (4/5)x - (154/5)