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)
14/210 = x/15 // - x/15
14/210-(x/15) = 0
1/15-1/15*x = 0 // - 1/15
-1/15*x = -1/15 // : -1/15
x = -1/15/(-1/15)
x = 1
x = 1
| 2/16=x/112 | | 45/x=9/5 | | x/18=20/72 | | 4/36=3/x | | 6+(x-4)(x-2)=(x-3)(x+3) | | 7/X=5/105 | | x/66=3/11 | | 2/8=6x | | 4+9=4x^2 | | Y=3x^3-6x+5 | | 2tan(3x)=sqrt(5) | | 6+2x+3=12 | | 2x+5+xX=(x-3)(x+3) | | 16x^2-9y^2=7 | | 0=16t^2+64+12 | | (X+5)(x+1)-4=(x-1)(x+3) | | w*3w-60=440 | | 2/3x100 | | (6w-6x-7)(4w+5x)= | | x^2-6x+y^2+5y=50 | | y=0.33333y+4 | | X+2(x-5)=1+(-3x+1) | | 121-a^2=0 | | 4x+(2x-1)-3(x-2)=0 | | 2.75+2.11= | | 3w^2+49w+60=0 | | 5n+10-2n=3n+4 | | (w+5)(3w+4)=0 | | 2x^2-5+2x=7 | | 291=78-v | | 7/0.8 | | 0.6x-9=12 |