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*42)/42 = x // - x
(3*42)/42-x = 0
3-x = 0 // - 3
-x = -3 // * -1
x = 3
x = 3
| 6(4.5+.5y)-3y=27 | | 4x=12+18 | | 42/3/3 | | P^2-4=-3p | | 5i=25 | | 4x-2(5x-4)=6x+(16-4x) | | (x+6)(x-1)-(x+3)(x-4)=5x | | 362=230+0.15n | | 9y+2+9y+2=15y+28 | | 67+64+23=g | | R^2+3r=28 | | 3x-18=2x+6 | | 20-2x+40-2x+40-2x+40-2x+20-2x= | | 15y+28=9y+2 | | 10x+14x-7=6(4x+8) | | 2ln(x+3)=ln(5x+29) | | 9y+2=15y+28 | | 3x-7=x+5# | | -50+0.50=300.00 | | 15x-5=15x+1 | | 3(1.1+-0.1)+3y=30 | | y/-2=10 | | 9p-4(2+p)=-18 | | 42x-42=14(3x-3) | | x+5+2x-2=90 | | -50/4 | | 122+y+14+y=180 | | 29-3s=23(3s-4) | | 15x+21=51 | | 8x+10=11x+8-3x+2 | | 2x-80+x+90=y | | 40x-8=40x+10 |