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)
a/3 = 0.9 // - 0.9
a/3-0.9 = 0
1/3*a-0.9 = 0 // + 0.9
1/3*a = 0.9 // : 1/3
a = 0.9/1/3
a = 2.70000003
a = 2.70000003
| -7/2+3 | | 8(1-5x)=-72 | | 1/2y+10y | | 7/2+3 | | 50x-6=-14 | | 3x+12=129 | | -1.33v=2.793 | | -12-2r=-2(1-4r) | | f(x)=5x-3 | | x/0.8=80 | | x^3+7x=22 | | 9x+11=-16 | | v/-3.45=5.23 | | 9x+11=-6 | | -x^2=12 | | 2x+3.75(2.5)=5 | | -a+3=5a+21 | | 3x^2=14 | | 1/5x+2/8(2.5)=1/2 | | 2(7+3m)=8 | | 5n+28=73 | | b+19.8=-19.2 | | -.87x-6=-.37x-14 | | 7x+4x-60=45-4x | | 5/6n-6=5 | | 5n+28= | | -22-6X=10X | | 33-3x=6(8x+2) | | 3x-2=-5+2x | | 3(.3+c)=2.5 | | 3/100x=72/1000 | | 11/10/3 |