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)
3/40 = x/100 // - x/100
3/40-(x/100) = 0
3/40-1/100*x = 0 // - 3/40
-1/100*x = -3/40 // : -1/100
x = -3/40/(-1/100)
x = 15/2
x = 15/2
| -10x-8x-141=93 | | -1/15x=13 | | 4u-9= | | 1/2+3x=5 | | -5y/9=10 | | -9=-3/8x | | 5x+6-7x=10+2x | | 322=.5x(26) | | -2/9w=-4 | | 11a+3=17x+39 | | y-60=17/2(x-20) | | 158=218-y | | x-2/3-x-3/2+1 | | 86-v=216 | | -y+287=190 | | 8x=2*2x+22 | | 2+5u=-33 | | 9x-7+9x=146-8x | | -18=4y-6 | | 4=-8+u/2 | | -6(u-1)=7u+45 | | 0.38+x=2.25 | | 2/3+4=-26 | | 2.5x+1.2=7.5 | | 168=.5(3x)(x) | | 2/3n=5k+7 | | -169-11x-3x=83 | | 31x-22+11x=88 | | 4s^2+11a-3=0 | | (3+z)(3z+5)=0 | | 5/x+2=6 | | 21+11x=7 |