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)*(1-((2*x)/8)) = 0
(3/7)*((-1/4)*x+1) = 0
3/7*(1-1/4*x) = 0
( 1-1/4*x )
1-1/4*x = 0 // - 1
-1/4*x = -1 // : -1/4
x = -1/(-1/4)
x = 4
( 3/7 )
3/7 = 0
x belongs to the empty set
x = 4
| x^2-12x+36-49y^2=0 | | 12y/15*20/18y | | (u-10)*9=81 | | F(x)=[[5.2]] | | (x+5)2+7(y+5)+6=0 | | 14y=14y-17 | | F(5.2)=[[5.2]] | | 5x^2-82x=200 | | 2x+2y*5n= | | 5(e+5)=40 | | 12x/6x/x-2 | | X=7n+2 | | 23-6n=18 | | -5*-5+6*-5-9= | | -5*-5+6*5-9= | | -2*(-3)= | | 40+(-37)= | | -50+(-25)= | | 6=12m-5 | | 125m^3+8p^3=0 | | X^2+4y^2=800 | | x^2+0.6x+10=0 | | 3(c+12)=45 | | 3+secx=5 | | -5b-b^2=14 | | 2*10-28/4-8 | | 8(x+8)+6=70 | | x^2+0.6x+10=equation | | 0=2x^2-106+480 | | 0=2x^2-212x+1920 | | 24-6n=18 | | 2(x-6)=2(3x-24) |