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)
(31/21)*x = 13/4 // - 13/4
(31/21)*x-(13/4) = 0
(31/21)*x-13/4 = 0
31/21*x-13/4 = 0 // + 13/4
31/21*x = 13/4 // : 31/21
x = 13/4/31/21
x = 273/124
x = 273/124
| 8n-2(-7-n)=-2(-3-6n) | | ((6x-3)/(3-x))+(15/(x-3)) | | 4(f-6)=28 | | T-12=20 | | (15/7)-9=(10/7)+15 | | 9/16-3/16 | | 15-12x=9y | | 4a-8(4a-3)=-2(-3a+5) | | 3/5x+4/5=-8/5 | | -10x-33=-8x+23 | | 0.85=200 | | 15/7-9=10/7+15 | | 2m^2+9m=0 | | 3=4v+7 | | y+12/6=9 | | 6n-9=n | | (6x-17y)-(4x-22y)= | | 2x^3=5x^2+12 | | -2k^2-28h-98=0 | | 0=4x^4-4x^3-16x^2+16x | | 10x^2-42x-40=0 | | 7-4(2x-8)=-3(4x+3) | | -6x+4(7x+6)=156 | | 7+7x=35 | | y=(x-3)(x+5) | | 11n=18n | | 84-116=-6(-4y)-13(2y)+y | | 6(5y+4)= | | 7x+1/2=18 | | (7x+11y)-(5x+6y)= | | 2x=x^2-4x | | x^3-5x^2-20x-32=0 |