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/2.1 = 4.1/3.5 // - 4.1/3.5
x/2.1-(4.1/3.5) = 0
x/2.1-1.17142857 = 0
0.47619048*x-1.17142857 = 0 // + 1.17142857
0.47619048*x = 1.17142857 // : 0.47619048
x = 1.17142857/0.47619048
x = 2.45999998
x = 2.45999998
| -5-9s=-10s | | 9+12+3x= | | 1-7v=10-6v | | -4+3w=-2-4w-9 | | -10-f=9f+10 | | -4d+10=-8-6d | | p=6q+2r | | 8x+27+3x= | | 8t=-8+9t | | 3/4z=1/4 | | 8+b^3= | | 8q=10+9q | | 110+54+2x=180 | | 110+54+2x=360 | | 3(3x-4)=14+45 | | 70=-7(-2+2z) | | x=3(9)-25 | | -8p=-10p-10 | | (-600)/x=(-0,3x^2)/2 | | 4(9)-6q=24 | | 9g=8g-7 | | 9x-1=3x-7 | | 38=16x^2 | | ln(5x+12)=7 | | 2/5*360 | | -600/x=-0,3x^2/2 | | 11=5y-59 | | 14y-8=19 | | 7.9=9.7-0.2x | | 288+7y=36 | | -4.9=.7x | | cot(y)=9x-6y |