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)
((3*(7*x+1))/4)*(x-8) = 0
(3*(7*x+1)*(x-8))/4 = 0
( 7*x+1 )
7*x+1 = 0 // - 1
7*x = -1 // : 7
x = -1/7
( x-8 )
x-8 = 0 // + 8
x = 8
x in { -1/7, 8 }
| -1/-3.5 | | -12(1+8x)=12(1-6x) | | 152-150+4= | | -21m=84 | | 2=12.2x-(-1.8x+2) | | 55/25 | | m/-15=-20 | | 2=12.2x+1.8x-2 | | m-82=64 | | 4=14x | | y-15=-78 | | (6*2-4)/2-3(8-5)*7 | | 8x/4=8/2 | | 1x=1/10 | | 2/n+1=6/2n+1-1/n-3 | | (12z^-4/z^7)^-2 | | 6/5k+9/5-2k+2/5+2/5k-6 | | -6-(-10)= | | 4(x+2)-2x=14 | | x=(5y-3)/(2y+1) | | 8x^2+3x=7x^2 | | 4b^2-4b-3=0 | | 4y-13=2y-5 | | 3/8+7=13 | | 0.20x+0.15(70)=25.5 | | 3x^2+5x-6=2x^2-6x+7 | | a^2-5a+1= | | 2x^2y-4xy-15y=0 | | 145-27/9+15*4 | | 4x+10y=80 | | 5xy+3=-12 | | 4y-3x=19 |