If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
y = (-1/8)*x+9 // - (-1/8)*x+9
y-((-1/8)*x)-9 = 0
(1/8)*x+y-9 = 0
1/8*x+y-9 = 0 // - y-9
1/8*x = -(y-9) // : 1/8
x = (-(y-9))/1/8
x = 8*(9-y)
x = 8*(9-y)
| -0.6x-0.9x-3=6 | | 8y=-x+9 | | 2+3(5-x)=-5+6x | | -a=40 | | 9x=y | | x/3-3=-7 | | 11x+21=120 | | (8y+30)-(2y+16)=-22 | | 5=y-6 | | 5p+5=11+4p | | 3x-1+x=9x+3+4 | | 8x^5/4x^3 | | 1/4x+1/8x=-9 | | 7z-29=-13+9z | | 0.1x=4.3 | | 3x-26=-20+6x | | z-3z=6z-2-z | | 20n-30=20-5n | | 3/4x+1/6+1/2x+4/5 | | 0.12y+0.08(y+2000)=1160 | | 3(x-6)=14-x | | 64*19= | | 0.3x^2-1.8x+0.3=0 | | -2(4x-18)+3x=6 | | -3x+18=3x-18 | | 0.12=3h | | 17=x/2+15 | | 5+x/6=-8 | | X+(3/2)=(-3/5) | | [3x-5]+4=14 | | 1/7x-5=7 | | 9+x/3=27 |