If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
8-(3*x) = 0
8-(3*x) = 0
8-(3*x) = 0
8-3*x = 0
8-3*x = 0 // - 8
-3*x = -8 // : -3
x = -8/(-3)
x = 8/3
x in (-oo:8/3) U (8/3:+oo)
(a-x)/(8-(3*x)) = (a+1)/7 // - (a+1)/7
(a-x)/(8-(3*x))-((a+1)/7) = 0
(a-x)/(8-3*x)-((a+1)/7) = 0
(a-x)/(8-3*x)+(-1*(a+1))/7 = 0
(7*(a-x))/(7*(8-3*x))+(-1*(a+1)*(8-3*x))/(7*(8-3*x)) = 0
7*(a-x)-1*(a+1)*(8-3*x) = 0
3*a*x-a-4*x-8 = 0
(3*a*x-a-4*x-8)/(7*(8-3*x)) = 0
(3*a*x-a-4*x-8)/(7*(8-3*x)) = 0 // * 7*(8-3*x)
3*a*x-a-4*x-8 = 0
-a-4*x-8 = 0 // + -a-8
-4*x = -(-a-8) // : -4
x = (-(-a-8))/(-4)
x = (a+8)/(-4)
x = (a+8)/(-4)
| a-x/8-3x=a+1/7 | | 2(x+4)=-5x-1 | | 2+x/3-2x=-1/2 | | y-1=(y+2)/3 | | y-1=y+2/3 | | 2c-18=-18 | | 5x+2 | | 5x+ | | z/2+2=4-z/2 | | -1/2x=-8 | | 5x+2/7 | | 15(13x+15)=80 | | 13x^5+250=0 | | x^2+55=0 | | -7=6(3x-13) | | x^(7/3)+81x | | 20=5+20m-2m | | 3x=99-18x | | 300.94-10x=42 | | 5*4-3+2=-5 | | x+67+x+129=180 | | -135=-69x+54y | | 6-4(3x-2)=8 | | 5/2x+3=0 | | 2x^2-9x-37=0 | | -2(4x+7)=2x+6 | | f(x)=x^2+6x-72 | | 25x+75y+500z=10000 | | 3y^2+44y-15=0 | | 3y^2+44y-14=0 | | m-8=22 | | 1304x/7= |