If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
3/7 = a-(2/6) // - a-(2/6)
3/7-a+2/6 = 0
16/21-a = 0 // - 16/21
-a = -16/21 // * -1
a = 16/21
a = 16/21
| 2x^2+4x+4=40000 | | 8x-12=0 | | 5-x=4x+15 | | X+2x+(2x+2)=100 | | 15w^5-50w^4+35w^3=0 | | (7+3i)-(8-8i)= | | sqrt(15x+18)=5x | | s^2+6s+14=0 | | 11x-12=9x+12 | | 3x+12=4x-10 | | 4x+3=2x-2 | | 5x-9=4x-7+2(x+1) | | (x*4)+[(1-x)*11]=9 | | 13x+2y=-9 | | 13x+8y=18500 | | s+12+23=36 | | 4x+1-3x=5-(x+8) | | 2m^3n^-6/10m^2n^6 | | (15*x)-9=21 | | 5x+17=14x+82 | | 11-6/5x=4 | | x^2-3x-16=2x^2-2x-4 | | 0=3x^2-5x-13 | | (4x^2-x-3)(3x^2+4x-1)= | | 3y-(11-2y)=y+11 | | g(f(x))= | | (x+3)^2/3=9 | | (1/6)-(1/2x^2)=(1/3x) | | 4x+13=2x+2 | | 5x+32=12x+45 | | 59-5/9 | | x-1/1/2=2/1/3 |