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)
x/13-31 = 0
1/13*x-31 = 0 // + 31
1/13*x = 31 // : 1/13
x = 31/1/13
x = 403
x = 403
| 2*9+4*5+3*12= | | 2x^2+2y^2+3x+5y-5=0 | | 12x^2-30=-2x | | 2u+(-8)=-25 | | f(x)=in(6-2x) | | 2(3x+4)-(5x+4)= | | 1/4w16 | | x^2+y^2+2x-4y-4=0 | | q+6=15 | | 3=(4-3)/o | | 5t^2+4t-10=0 | | 3=(4-3)/x | | 6x+2x+30=180 | | 11c-5c=18 | | 3=(4-x)/3 | | 6x=105 | | 7p-5p=16 | | 26-(4x-1)=-5(x+7) | | 47-7x=11+2x | | X-9y=183 | | (9x-3y)-(3x-2y)= | | 2/26-2/9 | | -4x+23=2x-1 | | f(x)=6x-x^2-8 | | 12a+4b=12 | | -5x/22=-1 | | (25/36)^-3/2 | | x(x)-36=0 | | 4y+8=84 | | 48=2u+16 | | 3/2=18/y-5 | | 4ln(3x)=9 |