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)
12/45 = x/30 // - x/30
12/45-(x/30) = 0
4/15-1/30*x = 0 // - 4/15
-1/30*x = -4/15 // : -1/30
x = -4/15/(-1/30)
x = 8
x = 8
| 6(a+9)=85.2 | | -113-10x=9x+10 | | 9.8=8c-3 | | 5e-8=27 | | 3p=16.8 | | 2y+3x=30 | | 9(a+2)=63 | | 30=5c-5 | | 5x=155 | | 13-2x=3x-12 | | (x*0.3)+(y*0.8)=9.7 | | 5b-3=4 | | 5y+6=5(y-1) | | 6x-3=2x-7 | | 2=16t^2+24t+5 | | 2/5x-20/5x=30/5-1/5 | | 1/2(4x-8)=3x+2 | | 2x/3-1=-1/3 | | 3v+2= | | 3x+5-2x=4(x-3)-3(x+7) | | x/2+1 | | x+2x+3x+4x=20x+10 | | x/5+6=11 | | 0.001x=10 | | 5y=2x+1 | | 2/3(12-3x)=-34 | | 4(500-4x)=650+10 | | 3x-6/5=-3 | | 2h-3=9 | | 300/15 | | 4+3x=7+x | | 20x-23=177 |