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)
3.5 = (1/8)*x // - (1/8)*x
3.5-((1/8)*x) = 0
(-1/8)*x+3.5 = 0
3.5-1/8*x = 0 // - 3.5
-1/8*x = -3.5 // : -1/8
x = -3.5/(-1/8)
x = 28
x = 28
| 10x=54+x | | 3(2+x)=15-2x | | 8v+1=7v-30 | | 7x(x+18)=0 | | 6x-6=6(x-1) | | N+54=18 | | 4x+20=-26 | | -2(x+5)+6x=-6 | | 2b=-5+b | | 9d-3= | | 4xy^2-9y=0 | | logx(512)=3/2 | | 1.28+0.9x=1+0.2x | | 6x=-45 | | 3=3*6-2 | | N-84=-21 | | logx(512)=2/3 | | -5c-7=4c+2 | | (1/2)x-8=15 | | 3x+16=4x+7 | | 14/6-21/m | | -12x^2+27x-27=0 | | g(2a+10)=5(a+5) | | -4-4x=0 | | p=3x-(100+2x) | | -6x+4(-1-3x)=6-18x | | (3.0085-6.0215)+t=-2.105 | | (4x-10)*(3x-7)=y | | 1725=25d | | -v+3-10v=-4-10 | | p-1=5p+p+3p-8 | | M-50=124 |